I have this problem with my usb, it has a virus. The virus tends to change all my folder into .exe. Unlike the previous virus I have it doesn’t hide my files it just change my folder to the .exe extension. I tried to clean it by avg but to no success. AVG does not even recognize it as a virus.
I also remember it made an exe file in my windows/system32 . The file is xp-***.exe, can’t remember the exact name. After a long search in the net about this xp-***.exe and I can’t find anything about it, I decided to download Avast antivirus.
Luckily for me Avast detected and cleaned the virus.