System configuration (built April 2009):
GA-MA790X-UD4P board
AMD Phenom 2.3 GHz Quad Core
2 sticks of 2GB each G.Skill RAM DDR2-1066 PC2-8500 CL 5-5-5-15 in DDR slots 1 and 2
Windows 7 Ultimate 64-bit since 4-30-2010
Problem: Every few days the system BSOD's overnight (only once during daily use but that caused important data loss) which began with the installation of Windows 7; never any problems with Windows XP Pro.
The message reads:
A clock interrupt was not received on a secondary processor within an allocated time.
ANY help solving this would be MUCH appreciated. I have built several desktops, but am only moderately experienced with issues this deep.

If a BIOS update will cure the problem, I'm afraid I need detailed step-by-step instructions, starting with the download process, since I have tried to do this from a floppy and received a "BIOS ID check error" message within Q-Flash Utility. After that the BSOD came back two days later, so I assume the BIOS update didn't take.