Only the trivial features of Windows 10 are working. For e.g. my touchpad sidescroll function gone, can't change display brightness, my speakers no more working on high bass settings, my phone when connected in usb debugging mode gets an error to install adb drivers, the power button feature set by me to turn off the display is gone, moreover the taskbar search is not working. Its my dad's PC and he says it all has happened because I changed his wallpaper which he had been using since 2015. So I cannot (even knowingly) accept the fact that windows has become corrupt. I want a solution apart from reinstalling Windows please. Also driver update is of no help
Try msconfig first Make sure it says Normal Startup
IF my previous suggestion fails:
- Backup everything up as it is now (do not skip)
- download Media Creation Tool
- Run tool
- Make to select Keep all programs and settings
- Complete and in place upgrade.