Month: December 2018

Windows OS goes to black screen after Windows update

Symptom: The client has a windows 7 PC. Windows OS goes to black screen after Windows update. It boots, but it goes to black screen after Windows popup.

Troubleshooting: 1. Safe mode and last known good configuration don’t fix the problem. Refer to this psot:

How to boot into Windows 10 Safe Mode in black screen

2. Run Windows repair locally, but can’t access because incorrect password.

3. Run Windows bootable DVD and run repair. But it doesn’t fix the problem.

4. Run Windows repair and select System restore. Select early system point, but that doesn’t fix the problem.

5. Run Windows repair and select command. The restore backup registry files. That fixes the problem. The step by step procedure can be find here:

How to recover a Windows system that does not start because of corruption in the registry

Note: 1. The registry backup files have been remove from \windows\repair in Windows XP to \windows\system32\config\regback in Windows 7 and 10.

2. OS may install on differnet drive instead of C drive.

windows 10 Critical_service_failed BSOD loop

Situation: The client has booting issue on his laptop running windows 10. It shows a BSOD with a “CRITICAL_SERVICE_FAILED” error, then restarts, goes back to the BSOD with the same error 3 seconds later, resets, and so on.

Troubleshooting: 1. This error is usually caused by a missing or corrupted device driver, or incompatibility issues with a newly installed hardware or driver. So as an initial recommendation, I would suggest you to disconnect any peripheral devices except for the mouse and keyboard and check if it helps.

2. Automatic Repair is a Windows recovery tool that can fix certain system problems that might prevent Windows from starting. Automatic Repair scans your computer for the problem and then tries to fix it so your computer can start correctly. Run Automatic repair and check the issue status.

Create Windows 10 ISO: http://www.microsoft.com/en-us/software-download/windows10

Please follow the below steps to perform the repair for the computer.

a) Insert the Installation Disk into the disk drive of the computer. Press any key from the keyboard when prompted to.

b) Follow the instructions till the Install Now screen and then Click Repair your computer.

c) Click Advanced Options.

d) Click Troubleshoot.

e) Click Automatic Repair.

f) Follow the on screen instructions.

3. Try safe mode or last known good. Then boot Windows was by booting with the option “Disable drivers signature enforcement“.

4. Perform a System Restore from Safe Mode

1) After your computer restarts for a few times, you should see Boot Options screen. From that screen choose Troubleshoot.

2) Next click on Advanced Options > Startup Settings.Click the restart button and wait for your computer to restart.

3) When your computer restarts you’ll be presented with the list of options. Press F4, F5 or F6 to enter into Safe Mode.

4) When Safe Mode starts type system restore into the search bar and run System Restore tool.

Please view the step by step video:

Run Windows System Restore to restore your system to an earlier state

5. Run Windows repair and select command. The restore backup registry files. That fixes the problem. The step by step procedure can be find here:

How to recover a Windows system that does not start because of corruption in the registry