Go to Start and then Click on Run
Type cmd and hit enter
Remember you cannot create Undeletable & unrenamable folder in your root directory (i.e. where the
windows is installed) That means you can't make this kind of folder in C: drive if you installed windows on C:
Type D: or E: and hit enter
Type md con\ and hit enter (md - make directory)
You may use other words such as aux, lpt1, lpt2, lpt3 up to lpt9 instead of con in above step.
Open that directory, you will see the folder created of name con.
Try to delete that folder or rename that folder windows will show the error message.