How to remove undeletable folder

In this trick i will share

how to remove the undeletable folder in your system drive
Just Below the following instructions to delete the folder :-

1. Press windows key and r (start-run)

2. type 'cmd' for command prompt

3. select your drive (eg: d:) and press enter

4. type 'rd con\' and press enter

Now your folder will be delete .... !