Yes. i reboot . and i also have problem the keyboard cmd.it's also have this .
my pc config:-Asus M4N68 LM v2
AMD phenom x2 555 Processor (2CPU) black edition (3.21ghz)
4 gb DDR 3 Ram
1 Gb ATI Readon 4300/4500 Series
660 Gb Hardsik
LG Monitor Fltron E2040T (16.9)
WIndows 7 (64) bit.
I got this problem to 6 months.i read somewhere install AVG antivirus and scan but nothing happen.
i got this problem thorugh my friend's pendrive.