About only way to fix it is a clean install. We can try a few things first
from desktop, open the power menu
while holding shift, click restart
this will restart PC in windows recovery
Try
system restore
choose troubleshoot
choose advanced
choose system restore
pick a date before the updates and see if PC can roll back to a time before the accident, this might fix it.
Safe mode
choose troubleshoot
choose advanced
choose start up options
click the restart button
choose a safe mode (it doesn't matter which) by using number associated with it.
Pc will restart and load safe mode
does it do it here? if it doesn't, backup anything on PC you want to save.
if safe mode doesn't work, . try this to back up data:
Copy data
Is safe mode didn't work above, try this once you dl installer below:
change boot order so USB is first, hdd second
boot from installer (see link below)
on screen after languages, choose repair this pc, not install.
choose troubleshoot
choose advanced
choose command prompt
type
notepad and press enter
in notepad, select file>open
Use file explorer to copy any files you need to save to USB or hdd
Now you can try a reset, this will roll system back to latest version and you will lose all installed applications but if you choose "Keep files and settings" it will save:
- Files = library folders. Library folders = Documents, pictures, movies, music (the default folders that come with windows;
- Settings = logins and desktop
choose troubleshoot
choose reset this PC
Choose keep files and settings
PC will restart and reinstall Windows 10. Resets only touch C drive so if you have multiple drives, the other ones will be ignored.
If reset doesn't work, you will need to do a clean install
Once you backed up everything...
Clean Install
on another PC, download the
Windows 10 media creation tool and use it to make a win 10 installer on USB
change boot order in BIOS so USB is first, hdd second
boot from installer
follow this guide:
http://www.tenforums.com/tutorials/1950-windows-10-clean-install.html
when you reach the screen asking for licence, click "I don't have a key" and win 10 will continue to install and reactivate once finished