Windows 8.1 does not start. Computer help. Black screen after installing updates

Starting the operating system in safe mode is one of the most common ways to diagnose problems. Earlier in safe mode could be accessed by clicking at boot, but this leads to the launch of automatic recovery. What if Safe Mode is what you want?

You can still get booted in Safe Mode, but you will have to dig into the settings to do this. Windows recovery 8. The key now starts the automatic recovery, but if you press + instead of it during boot, it becomes possible to manually select the recovery options. However, it's even easier to hold down and select the Restart command in Windows itself or on the login screen.

There are several ways to get into Safe Mode - it all depends on whether the system boots and whether you can enter it. Let's start with the simplest.

If the login screen is available

If the boot successfully reaches the login screen, you can hold down the key and select the "Restart" option from the shutdown menu. The Diagnostic Tools screen appears, from where you can enter Safe Mode. How exactly - read below.

If the system does not boot, but there is a recovery disc

If you have another PC with the same version of Windows close at hand, you can create a USB recovery drive and boot the failed PC from it to access diagnostic tools, including Safe Mode (more details below).

If the login screen is not available

If the download does not even reach the login screen, a recovery screen usually appears automatically. If this does not happen, try to hold down the key while loading and press until it boots new regime recovery. When the recovery screen appears, click the Advanced Options button.

The problem is that this screen does not always appear. Many computers, especially new ones, do not display it.

Using Advanced Options to Boot in Safe Mode

Whichever of the described methods you use, on the recovery screen that appears, click the "Troubleshoot" button.

Now select Advanced Options.

Finally click the Restart button.

After rebooting, by some miracle, the familiar boot options screen appears, from which you can select Safe Mode.

Launch Safe Mode right from Windows 8

There is another way to get into Safe Mode, but it will only work if Windows is already loaded. Press the keys + [R], enter the command "msconfig" (without quotes) in the window that appears and press.

In the window that opens, go to the Boot tab and check the Safe Boot box.

You can also select secure boot options:

"Minimal"- normal safe mode.
Alternate Shell- safe mode with command line.
Active Directory repair- safe mode to restore a server that is a domain controller in local network.
"Network"- Safe mode with network connection.

After selecting the desired option, click "OK" and restart your computer.

The system will automatically boot into Safe Mode.

Can't boot Windows 8 or Windows 8.1 in Safe Mode? You press F8 or Shift + F8, but it doesn't get you anywhere? The loading of the new operating system from Microsoft has become so fast that it is not always possible to interrupt it with keystrokes.

You can enter secure windows mode 8 or 8.1 5 different ways, any of them will allow you to run the system on Windows 8-8.1 safely!

Safe Mode in Windows 8 and Windows 8.1 is practically the same as in earlier versions of the OS.

The operating system still only loads the most basic drivers and services. The only noticeable difference is that the minimum screen resolution in Safe Mode has increased from 800x600 pixels to 1024x768 pixels.

1. Use the System Configuration tool (Msconfig.exe)

As with, the easiest way to boot into Safe Mode is to use System Configuration, also known as msconfig.exe.

Run it, go to the "Boot" tab and activate the "Safe Mode" option in the boot options. Then click on the "OK" button.

Next, you will see a message that you need to restart your computer. Click Restart or Quit without restarting, depending on whether you want the computer to restart now or later.

The next time you start Windows 8 (Windows 8.1) will boot into Safe Mode.

2. Use the combination Shift + Restart

Press the power button on the Windows logon screen or in the Settings Charm. Then press and hold the SHIFT key on your keyboard and hit Restart.

Windows will prompt you for an option. Select "Diagnostics".

On the Diagnostics screen, click the More Options button.

On the Advanced Options screen, click Boot Options.

When your computer restarts, a list of 9 options will appear on the screen, including three types of Safe Mode.

Press F4 on your keyboard to enable safe mode, F5 to enable safe mode with support network drivers and F6 to enable safe mode with command line support. After that, Windows 8 / Windows 8.1 will be loaded according to your choice.

3. Boot into Safe Mode using the System Recovery CD / DVD (Windows 8 only)

On Windows 8, but not Windows 8.1, you can. So, if you have such a disk, you can boot from it.

After booting from the recovery disc, you will be prompted to select a keyboard layout. Choose the one you want to use. Then you will see the options screen. All further steps will be identical to those described in method 2.

4. Boot into Safe Mode using USB for System Recovery

Windows 8 and Windows 8.1 allow. Detailed instructions can be found here. Using such a disk, you can also boot the OS in safe mode. To do this, boot from your USB system recovery drive and follow the instructions from the previous method.

5. Use F8 or Shift + F8 (does not work when using UEFI BIOS and SSD)

In the case of Windows 7, just press F8 just before starting the operating system to get to the menu with additional boot options, from where you can already boot the operating system in safe mode.

For Windows 8 and 8.1, some sites advise using the Shift + F8 keyboard shortcut, which launches recovery mode, which allows you to boot into safe mode. However, the problem is that neither Shift + F8 nor just F8 often work.

In a post on their official blog, Microsoft explains that this behavior is due to a very fast boot process. Steve Sinofsky once said: “Windows 8 has a problem. It loads too fast, so fast that in fact you simply don't have time to interrupt its download when you turn on your PC. The operating system simply does not have time to detect the pressing of the F2 or F8 keys. "

In general, if you have modern computer with UEFI BIOS and SSD, you are unlikely to be able to interrupt the boot process with keystrokes. On older PCs with classic BIOS and no SSD, pressing these keys still works.

Have a great day!

Sooner or later, this happens to all users. Yes, yes, we like it or not, but everyone will have to face the launch of the operating system in safe mode, regardless of whether the latter is installed on the computer. Windows version 8 or old Vista. However, if everything seems to be clear with the time-tested OS, then many users can tinker with a brand new gift from Microsoft. Let's take a look at how easy and at the same time fast it is to run on Windows computer 8 in safe mode.

Method # 1: Launch from the Options panel

In order to use this method and enter safe mode, press the power button in the "Options" panel, and then, while holding SHIFT on the keyboard, select the "Restart" option on the screen:

After that, in the "Select options" window, we find and select the "Diagnostics" tab by clicking the left mouse button, and then - "Additional parameters":

Our next step is to select the Boot Options tab in the new system window:

As a result, Windows 8 will offer, in particular, to run Safe Mode on the PC. We use this offer and immediately press the "Restart" button on the screen:

As a result, the PC will reboot. When you turn it on again, the system will display a number of options to turn on, among which there is safe mode. However, it will be presented in 3 versions:

• standard (enable by pressing the F4 button on the keyboard);
• with the launch of network drivers (activate with the F5 key);
• with a working command line (select with the F6 button).

We select the parameter we need and press the corresponding button on the keyboard. As a result, Windows 8 will restart in Safe Mode.

Method # 2: Starting from the command line

Those who have downloaded Windows 7 or any other OS from Microsoft at least once know that this task can be performed through the command line. You can use it in Windows 8, however, given the peculiarities of its work.

The first thing, of course, is. In this case, you can use different methods. In 8-ke, this is easiest to achieve if you press the hotkeys and X on the keyboard, and then select the option to enter the command line with administrator rights in the menu that opens. After the command line is loaded, we drive the value bcdedit / deletevalue (current) bootmenupolicy into it:

Note, if the parameter is entered incorrectly, the system will write a corresponding message in the command line. If it does not appear, then everything is in order and you can restart your computer. As a result, during the next launch of Windows 8, press F8 and select the required option in the familiar system window:

Please note that if you no longer need safe mode in the future, do not forget to turn it off by entering the bcdedit / set (current) bootmenupolicy standard parameter on the command line.

Method # 3: Boot with System Configuration

To start Safe Mode on computers running Windows 8 using this method, you first need to do one of the following:

Use the "Run" program:

To do this, press the keys and R on the keyboard. Next, it's easy - enter the msconfig parameter in the "Open" line and click OK:

Use command line:

We launch the command line (see method number 2), drive the msconfig parameter into it and press Enter on the keyboard:

Whichever option you choose, as a result, the system window "System Configuration" should open. In it, in the "Boot Options" section, select "Safe Mode" and click OK:

As a result, Windows 8 will prompt you to reboot. We, of course, do not refuse (why should we try so hard) and send the PC to reboot. The result of such actions is simple - the OS will start in safe mode without unnecessary settings. Note that if you need a normal boot of the operating system, you will have to go to the "System Configuration" again. In this case, it will be enough to uncheck the Safe Mode item and save the setting with the OK button.

Method # 4: Launch using a bootable disk or USB flash-card with Windows 8

If for some reason you could not start Safe Mode on your computer using the previous methods, but you still have an installation CD / DVD or USB flash drive with this OS, you can solve the problem with their help. Note that in both cases, you will have to act in a similar way. Let's offer for example Windows startup 8 on a PC in safe mode using boot disk.

To do this, insert it into the drive and restart the PC. Then we go into BIOS, select boot from CD / DVD and run the OS installer. Next, enter the settings (language, date, time, etc.) and wait until such a window appears on the screen:

Now, to open Safe Mode on your computer, click "System Restore" and perform the following actions one by one:

1. In the "Select action" window, mark "Diagnostics";
2. We select "Additional parameters";
3. Click the tab " Command line»;
4. Enter bcdedit / set (globalsettings) advancedoptions true on the command line for execution, press Enter and close the tab;
5. In the new window, click "Continue".

As a result, the system will restart in safe mode. To return the operating system to its original state, enter the value bcdedit / deletevalue (globalsettings) advancedoptions into the command line.

Method # 5: Launch with hotkeys

Why didn't we start with this method? Because it is not possible to use it to load Safe Mode on all computers with Windows 8. In particular, if the PC has a UEFI BIOS or SSD installed, it will not work, but in the standard BIOS mode this method works without interruption.

If your situation is exactly like this, let's say that safe mode can be launched simultaneously with the OS boot by simply pressing F8 on the keyboard or by combining this button with with the Shift key... If you did it on time, a standard window will appear on the screen, as in method No. 2, in which you can select the appropriate option for loading the system.

As you can see, there are different ways to start Safe Mode in Windows 8. Just choose the way you like and go from dream to reality!

If yours does not load operating system, then your main task is to identify the cause and, if possible, eliminate it. There are two possible scenarios for the development of events: damage to the computer hardware and the need to replace any component, or simply a system failure, which is solved by a simple rollback. Let's look at how to determine what caused the error, as well as how to fix the problem.

Attention!
All of the following actions are strongly recommended to be carried out only if you fully understand all of the above, so as not to harm your computer.

If after turning on the computer nothing happens and you do not see the OS boot process, then most likely the problem is a malfunction of some components of the device. The first step is to check if all the components of the computer are connected. To do this, unplug the computer from the mains and turn off the power supply using the toggle switch on the back. Open the case.

Reason 1: Hard drive failure

If after performing the above steps the problem persists, then go to verification of hard disk. A very common cause of the problem is a media malfunction. You can check its performance only by connecting the component to another computer. There are three possible scenarios for the development of events.

Option 1: HDD is detected by another computer and Windows boots

All perfectly! Your hard drive is working and the problem is not with it.

In this case, you need to check the disk for bad sectors. You can do this using the special program Crystal Disk Info. It is completely free and will help you navigate full diagnostics hard drive. Run it and pay attention to items such as Reassigned sectors, Unstable sectors, Fatal sector errors... If at least one of these items is highlighted in yellow, then broken sectors are there and need to be corrected.

To restore bad blocks, run Command line as administrator. To do this, using the key combination Win + X open up context menu and select the appropriate item.

Then enter the following command:

Click on Enter... You will be prompted to perform a recovery after the system reboot. Enter Y and press again Enter... Then restart your computer.

Option 3: HDD not detected by another computer

This is the worst case scenario. In this case, you will have to purchase a new hard drive, since the old one, most likely, cannot be restored. But before doing anything, consult the service center. Perhaps your hard drive can still be restored to working condition. Otherwise, they will recommend you which drive is better to take and offer replacement services.

Reason 2: Some components are not connected

If your hard drive is working, then check the following components:

• Hard disk power cable;
• Flex cable that connects the hard drive and the motherboard;
• Are the memory modules seated tightly in the slots?

Reason 3: Malfunction of the motherboard

If the above steps did not have any result, then the matter is not in the cables and the hard drive, but in the motherboard. It is better to entrust such a problem to specialists and take the computer to service center.

The system tries to boot, but nothing comes out

If you've turned on your PC and you see any signs that the system is trying to boot, then that's a great sign. In this case, you can avoid costs and solve the problem yourself.

Reason 1: Failed to launch explorer.exe

If the system boots, but you see only a black screen and a cursor, then the problem arose when the explorer.exe process was launched, which is responsible for loading the graphical shell. Here you can either start the process manually, or roll back the system - at your discretion.

If you do not start Windows 8, then this problem will have to be corrected depending on what caused it. For example, if the computer has problems with components, then reinstall the system, do rollbacks, etc. pointless, since you initially need to check and repair the components. If the problem lies only in the system, then it makes no sense to go into the components.

When the PC does not show "signs of life"

In this case, after turning on, you may not even appear Windows logo, but entering the BIOS will be possible in some cases. Sometimes, after pressing the power button, the computer begins to give some signs of life, but they quickly fade away, so it is not even possible to enter the BIOS. Most likely you have some kind of problems with the components, and not with the system itself, so you need to disassemble the case, having previously disconnected the computer from the power supply.

It is recommended that you try to restore the Windows 8 operating system yourself on your own only if you understand what you are doing and are fully aware of it. Otherwise, it is recommended to seek help from specialists.

Reason 1: Power supply failure

If, when you press the power button, the computer does not react in any way or gives signs of life only for the first few seconds, then you may have a problem with the power supply itself. In this case, it is recommended to temporarily disconnect the power supply from the entire computer and check its performance separately by closing two contacts on it. If the power supply unit started up without problems and worked for some time in this mode, then the problem is most likely not in it. If not, then it will either have to be taken to a service center, where it can be repaired, or purchased new block nutrition.

Reason 2: Incorrect connection of components to the motherboard

In this case, the computer may also show signs of life for a short period of time, but this does not always mean that the problem will lie in the power supply or in a malfunction of the motherboard. It is recommended to check the connection quality of the following components:

• A power cable that goes from the motherboard to your hard drive. Sometimes this cable can go from the power supply to the hard drive;
• Loop connecting HDD with a motherboard;
• How well the RAM modules fit in their slots on the motherboard.

Reason 3: Defective hard disk

This is one of the most common reasons why the computer cannot turn on. Moreover, this applies not only to Windows 8, but also to any other OS, even Linux. To be sure to check the functionality hard disk you will have no choice but to connect it to another computer and try to start it. You need to check the disk on which the operating system is installed, respectively.
When connecting your hard drive, there are three possible scenarios.

Option 1: Uploading to another computer went smoothly

This option assumes that everything is completely in order with your HDD, and the problem most likely lies in Windows itself and / or other computer components. You may have recently connected some new component / device to your motherboard that is not compatible with another important component. Also, in this case, it is recommended to check the correctness of connection of some other components to the motherboard, perhaps the cables have gone somewhere, etc.

Option 2: No display problem and Windows won't boot

In this case, you most likely have some broken partitions on the disk that prevent the system from booting. You can check the hard disk using special programs as well as special commands in the console. However, the latter do not always give an accurate result, therefore, it recommends using third-party software for verification. In this case, we will focus on such a program as Crystal Disk Info.

Install it on the computer to which you connected your HDD and check some parameters. At the top of the window, you can switch between drives by clicking on the desired letter. A general description will be given below, and under "Technical condition" the current state of the disk will be indicated. If it says there "Anxiety", then there are most likely broken sections.

It is also recommended to pay attention to the points Reassigned Sectors, Volatile Sectors and "Fatal sector errors"... If there is a yellow circle to the left of them, it means that the broken partitions on the disk are 100% present.

"Cure" the same broken blocks can be used with "Command line"... Open it with cmd commands in line "Run"(it opens with the combination Win + R) or use the special menu called by the keyboard shortcut Win + X... In this menu you need to select "Command line (administrator)".

Enter the following command in the console:

To apply, you need to click on Enter and then press the key Y, thereby confirming the beginning of the operation to restore the sectors of the hard disk. The recovery process itself will begin after restarting your computer, so reboot. When the recovery is complete, the computer will turn on normally.

Once you have restored all partitions on your hard drive, you can mount it back to your computer and try to start the operating system.

Option 3: The hard drive won't boot at all

In this case, you have a 100% problem with the hardware part of the HDD. Do not rush to throw away this hard drive, but rather contact the service center, especially if the warranty is still active on the computer and / or hard drive. In this case, the drive will be repaired or replaced with a new one according to the warranty agreement. If the guarantee is no longer there, then you will have to pay money for the repair / replacement of the hard drive.

Reason 4: Faulty motherboard

Provided that none of the above reasons is suitable for your specific situation (the power supply is working fine, all cables are tightly connected, and the HDD works without problems on another computer), then the problem in most cases lies in motherboard... It is recommended that you take it to a service center, where it should either be replaced or offer you an alternative.

The system is loading, but not completely

In this case, you can observe the full load of the Windows 8 operating system, but it just cannot be completed to the end. In this case, the problem is most likely system files that have been damaged for some reason. However, here, in most cases, you can solve the problem yourself without resorting to the help of service centers, which will save you money and time.

Reason 1: Unable to load the GUI

If, when you turn on and boot the OS, instead of "Desktop" and "Taskbars" just a black screen appears, but the login window is displayed normally (the window where the user can select account to work in the OS and enter the password from it), then you have problems with the file explorer.exe. This file responsible for displaying all graphic elements within the system.

In this case, the system is fully operational, for example, you through the line "Run" you can open any program, and it will most likely open. But in order to return to the normal Windows interface, you either need to start the process explorer.exe manually, or do a system restore.

Consider the file launch instruction explorer.exe across "Task Manager":

Also, this problem can be solved by rolling back the system. The rollback process is described in more detail in the instructions below.

Reason 2: System failure

A system failure is usually a little more difficult to deal with, since you often have to resort to the function "System Restore"... This procedure looks like this:

1. Turn off your computer and then turn it on again.
2. To call a special menu in Windows 8, you need to press the key F8 or Shift + F8.
3. A window with a choice of actions will open. You need to choose "Diagnostics".




4. In the diagnostics window, select "Extra options".




5. Then go to "System Restore".




6. In the window that opens, select a restore point for the date you need. If no restore points are found, then this method will not work for you. For this case, a separate instruction is described below.




7. If everything is fine, then after selecting a point, click on "Further" and then on "Ready"... After that, the recovery process will begin.

Also, if there are no restore points or for some other reason the first instruction did not work, then try to make a recovery using a specially created bootable flash drive... It must be prepared in advance by loading the Windows 8 installer image there. The instruction is somewhat similar to the previous one, but it has some differences:

Searching for the reason did not return any results

If you could not determine the reason why Windows 8 refuses to start, then you will have to resort to the last resort - reinstalling the system. This method can only be relevant if you know for sure that the reason lies not in the hardware of the computer. Otherwise, even reinstalling the system will not help you.

Please be aware that reinstalling the operating system is violating the warranty agreement. Therefore, after reinstallation, your computer is unlikely to be accepted under warranty (although there are exceptions).

To install, you need to boot from a USB flash drive that has an installation windows image 8. You can also try booting from disk. The installation process is no different from the usual Windows installations... However, it is worth remembering that you risk losing part or all of the data that is on the C drive during the reinstallation of the system. Some of this data can be recovered.

Also, in this case, you run the risk of losing Windows activation 8. It will be possible to restore it through the official Microsoft website or directly during the reinstallation process.

As you can see, it is not always the fact that the operating room Windows system 8 refuses to boot a reason to carry the computer to a service center. V certain cases you can set up and fix everything yourself.