Step 1: Open a Command Prompt window and leave it open.

Step 2: Close all open programs.

Step 3: Click Start, Run and enter TASKMGR.EXE

Step 4: Go to the Processes tab and End Process on Explorer.exe.

Step 5: Leave Task Manager open.

Step 6: Go back to the Command Prompt window and change to the directory the AVI (or other undeletable file) is located in.

Step 7: At the command prompt type DEL <filename> where <filename> is the file you wish to delete.

Step 8: Go back to Task Manager, click File, New Task and enter EXPLORER.EXE to restart the GUI shell.

Step 9: Close Task Manager.