I can't use any USB flash drive in my computer, as when I insert them, there is an error that says that I can't and if I want to format it.
It happens with every usb and just when I log in with my user account for the first time. For example if just after switching it on, I log in with another user, they work fine. If after this I log off (not reboot) and log in with my user, they work fine as well.
If I log in with my user but in safe mode, they work fine as well.
I would say it is a virus but I don't seem to have any virus or malware (I passed my antivirus [eset nod32] and my antimalware [malwarebytes] both on "normal" mode and on save mode. I also cleaned my computer with ccleaner and cleaned my USB cache and inserted every USB again (this seemed to work but a day after this, it happened again).
I don't know what else to look/do.