Method 1: System File Checker Scan in Safe Mode (Windows 8/8.1/10/7/Vista)
After you have logged in the safe mode with networking, hold Windows key and press R. Type cmd in the Run dialog and click OK. Then, type SFC /scannow in the black command prompt and hit Enter. Wait for the SFC to finish scanning, after it has finished scanning, reboot the computer and check if you are able to log in, if not the boot back into Safe Mode and continue with the steps below (system restore)
Method 2: System Restore in Safe Mode (Windows 8/8.1/10/7/Vista)
Click the Start button and type system restore in the Start Menu‘s search and hit Enter OR open run and type rstrui.exe then Click OK. You can open run by holding the windows key and pressing R.
Click the System Restore option from the search. After it loads up, place a check on Show More Restore Points and click Next.restore-points-more
Select a restore point by looking at the dates when your computer was working fine. Click Next and Finish. This will start system restore, and the computer will reboot after the reboot has finished. If the black screen issue still exists, follow the next method.
Reboot back into Safe Mode. After you are logged in, do the following steps:
Hold Windows key and press R
Type hdwwiz.cpl and click OK
Device Manager
Typing in hddwiz.cpl
Expand Display Adapters. (make a note of your display adapters name)
Right-click on it and select Uninstall.
After it has been uninstalled, reboot the PC back into normal mode and re-download the latest drivers.
Method 4 :alt+ctrl+del
selct new run type 'explorer'
and enter
and remove display driver
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