Windows won't let you delete, move, or rename a file if a program is using it. Frustratingly, it also won't tell you which program is using the file so that you can solve the problem.

If you can't delete files from an SD card on your Windows 11/10 computer, check the physical lock switch, remove write protection, etc.

If you cannot delete the font files and see Font cannot be deleted because it is in use message, take full control of it, and then delete it.

As in the description. I've had this problem for a while, but now, I just actually really need to copy some files to an USB drive. I can't format USB drives, I can't delete files and I can't copy ...