There is another appraoch to the problem as well. If Windows won't let you delete a file, it is often because a running progam has the file in question in use. If you shut down the progam that is using the file, you can delete it.
The bad news is that if the file is in use there may still be a virus 'app.' running in the background somewhere. You might try shutting some programs down and see if you can delete it.