if you got problem to find hidden files and also to delete it, try use Hidden File Scanner

Scans drives for hidden files and allow to unhide or delete them.

Hidden File Scanner also does a quick scan at start for the appearance of autorun.inf files on all devices. If such an autorun.inf file is found, it will display a dialog where you can delete, unhide or inspect the content of the autorun.inf.
It automatically rate the autorun.inf files as normal, hidden, suspicious or dangerous file.