HI Ryzard is your user account an administrator account? If not it should be. Control Panel/ User accounts - change account type.

Which drive do you mean? If it is a non system drive it might have gone down,v (or not be plugged in too well) you can check it in Windows here.

http://support.microsoft.com/kb/2641432/en-gb


File permissions are about who sees what. Right click on the offending folder go to properties/ security


Win 11 64, Asus Rog Strix z390 mobo, 64 gig RAM, 8700k