Checked the computer first for viruses then do this:
1. Run cmd - Navigate to Accessories>Command Prompt (Run this with Admin rights)
2. type attrib *.* X: -r -s -h /s /d (where X: is the drive, this is your flash drive letter)
3. you can invoke other commands by typing attrib /?
Feedback after tol..
After step 2 punta ka flasdrive mu.. Check mu if naroon na files mu..
Kung hindi gagana first trick try mu ito:
Tools>>>Folder Options>>>View and checked the option "Hide protected Operating System Files"