ok guys i found the virus in program files 86 but,
why i can't delete http://prntscr.com/ao1wjq look what's saying?
Firstly, make sure you are logged in as an account with administrative privileges.
Start > Control Panel > Change Account Type
You should see your account name here with 'Administrator' written underneath. If it says Standard User or Guest, this will most likely be your problem.
If it does say Administrator, am I correct in saying these files were not created your this computer? If so, take ownership of them using this guide.
http://technet.microsoft.com/en-us/library/cc753659.asp...
Be sure to select "Replace owner on subcontainers and objects"
If you simply want to delete EVERYTHING on the pen drive, it may be easier just to format it.