"Make sure the disk is not full or write-protected and that the file is not currently in use."
"There has been a sharing violation."
"The source or destination file may be in use."

- These are typical error messages you get when you try to delete a file that is locked by a process. But which process has locked the file? Use FreeFile to automatically find out which process is locking your file, and free the file by ending the process.