Have you tried
Unlocker?
Or,
take ownership of the file.
If using XP Pro, open My Computer or My Documents. Click on Folder Options and select the View tab. At the bottom of the list, uncheck the "Use simple file sharing (recommended)" box to display the
Security tab when you open a folder's Properties.
If using XP Home, you have to Start Windows in Safe Mode
and log in with the Administrator account. The
Security tab will appear.