Have you tried deleting it, in Safe Mode?How to start Windows in Safe Mode
Have you tried renaming the file, then deleting it?
Name it anything you want, like trash, old, useless, ........ whatever.
Have you checked the folder's Properties?
Right click the folder, and select Properties
Make sure it's not set to Read-only
If it is, uncheck it, click Apply
, and click OK
Now try to delete it.
If none of the above works, here are a couple of programs, you can try:EraserUnlockerDelete Doctor
There's also this Microsoft Knowledge Base Article that might be helpful:How To Take Ownership of a File or Folder in Windows XP