fix cpu utilization by closing explore.exe

Sometimes after I play a certain kind of video and then close the media player, my CPU utilization still remains very high even if I open task manager to make sure the media player has been closed. In this case it seems explorer.exe is eating up all my cpu cycles. If I wait long enough this will sometimes fix itself, but I find my ending explorer.exe program from task manager and then restarting if from task manager by clicking file/ run program- explorer.exe, this will fix my computer's run away cpu cycles faster then the way I used to do which was just by restarting computer. Didn't know if this was advisable or not though.