Question Windows randomly activates Alt Key or Locks Alt Key

[Hoosker]

2 Days ago I noticed that while typing, randomly the Alt key would activate as if depressed.
When I opened Notepad, I could sometimes see the menus highlight as if Alt was being spammed.
Thinking it was my old Razer Keyboard, I went through all troubleshooting, then replaced it with a new keyboard.
Same Thing.
Thinking it may be my XP-Pen I disconnected and uninstalled all hardware.
Same Thing
Sometimes when my Desktop goes to sleep, I can't log back in because the Alt is locked, even on the Microsoft On-Screen Keyboard I can't unlock Alt Keys
This is on a Desktop with Windows 10 Home
This is random, several times a day and I'll be forced to restart computer.

Any suggestions would be appreciated


Below is an image I found online of what my onscreen keyboard looks like when this happens.

 

[Lutfij]

You forgot to mention the make and model of the keyboard's being used. Can you please pass on the specs to your build? Please add the BIOS version for your motherboard as well.

 

[Colif]

Try a clean boot and see if it changes anything - make sure to read instructions and make sure NOT to disable any microsoft services or windows won't load right - https://support.microsoft.com/en-au/help/929135/how-to-perform-a-clean-boot-in-windows

It doesn’t delete anything, it just stops non Microsoft programs running with start. Easy to reverse.

if clean boot fixes it, it shows its likely a startup program. You should, over a number of startups. restart the programs you stopped to isolate the one that is to blame.