Check your machine for virus's, etc. Try Right Clicking on your desktop, then click refresh. Try Ctrl+Alt+Del, then Task Manager, Click on Processes Tab, then locate explorer.exe and right click and click end process, then click File, New Task(Run) and type explorer.exe
------------------------------Intel Core i5 750 @ 3.7GHz,
Antec 25 Kuhler 620,
Asus Maximus 3 Formula,
4GB 1333MHz Corsair, NVidia GTX 275,
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