Your post is lacking details such as if you tried the Windows Reset where apps and files remain or if this is an upgrade that the owner didn't know about checking for drivers and apps like we've done for decades.
Having an issue with a Windows 10 laptop, the screen is flashing black an white on startup. Video of the issue at https://youtu.be/SJAbp3lJj6k (note: Moderator corrected link with edit)
It appears to be stuck on the home screen as you can something catch it for a split second but then it's just flashing black and white.
The screen doesn't appear to be faulty because when we toggle the screen with fn + f8 the options appear perfectly fine.