A small trick

Press CRTL + ALT + DEL

Goto the 'processes' tab and click explorer.exe once and then click 'end process'.
MAGIC!!!
The Taskbar and the icons on the desktop were all gone.
If you want to retrive.
click File > New Task and type explorer.exe

Everything should be fine now! If the problem is major, I would recomend actually shutting down then starting up again.