Delete "undeletable" Files in Windows

Delete "undeletable" Files in Windows

Open a Command Prompt window and leave it open. Close all open programs. Open Taskmanager, Go to the Processes tab and End Process on Explorer.exe.
Leave Task Manager open.
Go back to the Command Prompt window and Type:
CD "Enter the file(which you want to delete) path"
now at the command prompt Type:
DEL <filename>
file succesfully deleted;
Go back to Task ...Manager, click File, New Task and enter EXPLORER.EXE to restart the GUI shell.
Close Task Manager.
<tested on Windows 7,8,8.1>
done !!!