This trick is important when you don't like to reboot your computer when it hangs, you can follow these simple steps to 'reboot' your computer without 'rebooting' it.
Press CRTL + ALT + DEL
Goto the 'processes' tab and click explorer.exe once and then click 'end process'.
Now, click File > New Task and type explorer.exe
then you will see to the normal behaviour again. except if it is a major problem that needs restart.
