Hey, I have encountered same problem long before. here is the fix:
1. Go to cmd >
type in :
2. attrib -h -r -s /s /d Drivename:\*.* (This command helps to unhide all hidden files and removes shortcuts)
3. If you are infected by malicious script , here is how to remove it.
Press Ctrl+Shift+Esc > opens Task Manager > go to process Tab, stop wscript.exe.
4. disable wscript.exe starting from boot , open Run>type in msconfig >go to startup tab disable wscript.exe.
5. Go to Run , type in regedit Navigate to HKEY_CURRENT_USER / Software / Microsoft / Windows / CurrentVersion / Run
Delete odwcamszas registry key in that directory.
You can also download this Tool to fix your USB drive :
http://filehippo.com/download_usbfix