Can't open files on Flash

Hello,
Can't open any file from my flash, under Windows XP Sp2. I disabled antivirus/firewall programs and when i try to open files or even to copy to a directory on my computer, my computer freezes with message that Windows Explorer is having some kind of problem and try to send this to Microsoft. I try several flash disk, but the problem stands. This is happening only with files that are on root directory of my Flash. Files that are in some other directory working fine. Strange!?!