Autorun.inf virus in usb

Hello!
I think I have an autorun.inf virus in my usb. I think my usb get it when I inserted it in my classmates laptop =_=
I first saw the autorun icon when I inserted it in my tablet. I tried to delete it but it doesn't work. Then I tried searching on how to delete this thing ........but when I opened my usb in our PC...........its gone or should I say its hidden/offline blah blah (that's what my antivirus says). I tried the manual deleting but it keeps saying: access denied =_=
Can you help me solve my problem? Please? TT__TT
Its driving me crazy TT_TT