Files Hidden on Pendrive

My pendrive was yesterday infected with some virus & I cleaned it. After cleaning, files & folders were made hidden. Secondly, when I tried unhidding it, the checked Hidden option on the properties dialog box was unaccessible. I can’t access any of my files and folders on my pendrive, IRRESPECTIVE of which ever PC I insert it in. I’m a desparate man in need of help. Thanx folks.