Easy and Fast Prank on Windows Computers

this is an easy prank you can do to a friend that loves his computer... say hes in the bathroom for 15 seconds??

first you want to bring up task manager
do this by pressing control+alt+delete

click the "processes" tab, and find explorer.exe

and then, press "end process"

NOTE: be sure EVERYTHING is minimized or else it wont work, all the icons and the start menu bar go away but programs that are still up

when you think your friend has had enough, bring up task manager again, (control+alt+delete),then click File > New task (run)
then type in "explorer"
and everything should come back up