Pcr 800 turns off after a minute windows 10

Troubleshooting a Black Screen After Signing Into Windows 10: A Step-by-Step Guide

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If you've recently signed into your Windows 10 computer only to find yourself greeted by an unresponsive black screen with access to your desktop still available, don't panic! This frustrating issue can be caused by several factors. In this article, we'll walk through some simple yet effective troubleshooting steps that may help resolve the problem and get you back up and running in no time.

Step 1: Restart Your PC

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The most straightforward solution to any computer-related issue is always a good old-fashioned restart of your system. Pressing both the Ctrl + Alt keys simultaneously on Windows or Command + Option (or ⌃⌥) if you're using an Apple device while pressing and holding down the Power button should force-shutdown your PC.

Once it has completely powered off, wait for about 30 seconds before attempting to restart again. If this doesn't work as expected, proceed with further troubleshooting steps below:

Step 2: Run a System File Checker (SFC) Scan

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Sometimes, corrupted or missing system files can cause various issues on your computer including black screens after signing in.

1. Insert the installation media for Windows 10 into your optical drive or ensure that you have downloaded and saved an ISO file of the operating system from Microsoft's official website.

2. Restart your PC while holding down F8 until you reach the Advanced Options menu.

3. From here, select 'Troubleshoot' followed by clicking on 'Advanced options.'

4. In this new window, click on 'Startup Settings.'

5. Here, enable 'Safe Mode with Networking' and then press the 'Restart' button.

6. Once your PC has fully booted into Safe Mode without any errors or blue screens appearing, right-click on Start (or lower left corner if you're using a tablet) > Computer/This PC.

7. Right-click again on your Hard Drive where Windows is installed and select Properties.

8. Under the 'Tools' tab at the top-right corner of this new window, click 'Run Check Now'.

9. This will trigger both an Automatic File System (chkdsk) scan followed by a thorough System File Checker (sfc /scannow) to fix any potential issues that may be causing your black screen problem.

Step 3: Run DISM Scans

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If running SFC scans didn't resolve the issue, it's time to try some more advanced troubleshooting methods. The Deployment Image Servicing and Management (DISM) tool can help repair corruptions in Windows Component Store or registry hive files that may be contributing factors.

1. Open Command Prompt as an administrator by right-clicking on Start > Computer/This PC > Manage.

2. From the left-hand side of this window, double-click 'Device Manager.'

3. In the new pop-up dialog box titled 'Computer Management', scroll down to find your Hard Drive under which you'll see a subcategory labeled as 'Disk Drives'.

4. Double click on it and then select the drive letter corresponding with the problematic hard disk (usually C:).

5. Click 'Properties' at bottom right corner.

6. Under 'Details', look for 'Physical Location On Disk'.

7. Make note of this value because we'll need it later.

8. Now, open elevated Command Prompt again as per step 2 above.

9. Type the following command and press Enter:

```

DISM /Online /Cleanup-Image /Revert-Health

```

10. Wait for completion; if prompted to restart when finished doing so do so now before proceeding further with next steps:

Step 4: Run DISM Scan Again & Check Event Viewer Logs

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If step 3 didn't resolve the issue, try running a second DISM scan followed by checking your event logs.

1. Open elevated Command Prompt again as per step 2 above.

2. Type the following command and press Enter:

```

DISM /Online /SFCIntegrate /AllCaches

```

3. Wait for completion; if prompted to restart when finished doing so do so now before proceeding further with next steps:

4. Press Win + R on your keyboard, type 'eventvwr' in the Run box and press Enter.

5. In Event Viewer, under 'Application' section expand both 'Microsoft-Windows-Boot/Operational' & 'System'.

6. Look for any entries dated around when you last encountered this black screen problem.

7. If possible, copy/paste these log details into your original post so we can better understand what might be causing the issue:

Additional Troubleshooting Steps

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If none of the above steps have resolved your black screen after signing in on Windows 10, there are a few more advanced troubleshooting methods you could try before considering a full system restore or even reinstallation.

1. Check for any recently installed drivers: Sometimes newly added device drivers can conflict with existing ones causing various issues including blue screens and black desktops.

2. Run System File Checker (SFC) in Safe Mode only:

- Boot into Safe Mode as per step 3 above

- Open Command Prompt as an administrator by right-clicking on Start > Computer/This PC > Manage

- In the left-hand side of this window, double-click 'Device Manager'

- Find your Hard Drive under which you'll see a subcategory labeled as 'Disk Drinks'

- Double click it and then select the drive letter corresponding with the problematic hard disk (usually C:).

3. Perform an SFC scan on boot:

1. Insert installation media or ISO file into optical drive

2. Restart PC while holding down Shift + F10 until you reach Advanced Options menu.

3. Select 'Troubleshoot' followed by clicking on 'Advanced options'

4. In this new window, click on 'Startup Settings'

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If none of the above steps have resolved your black screen after signing into Windows 10 issue, it may be time to consider a full system restore or even reinstallation as a last resort.

Remember that troubleshooting can sometimes feel like trial and error, so don't give up too easily! If you're still experiencing issues despite trying all of these suggestions,

References:

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1. How to fix black screen with desktop access on Windows 10

2. Troubleshoot a computer that is running Windows 8 or Windows Server 2012-based system that randomly restarts when you start the computer (KB2828479)

Pcr 800 turns off after a minute windows 10