Windows 7: Windows 7 logo/flag flashes during boot process

Hi, I have a problem with windows 7 32 bit.

When you start the pc the logo / flag flashes on Windows 7 and the whole pc goes crazy. I have already tried another power supply and the system re-installed but that brought nothing. Bios has also been updated and I have also made clear cmos.



Perhaps knowledge of the problem, or know someone a solution for this?

My system:
ASUS M4A785TD - EVO V
AMD PHENOM II 955
4 GB GEIL DDR3 12800 (2 x 2 GB)
ATI HD3850
550 W power supply
Windows 7 Ultimate 32 bit

Need your suggestions and comments ..
Thank you very much

I have the exact same problem. I believe this started for me after I installed some new fonts. They are deleted now, but the logo still flashes.

Really annoying, the PC has been acting strange lately, and I guess it might be a virus. Norton and SUPERAntiSpyware can't seem to find anything, though.