I had a CMOS "problem" once. Basically I left the motherboard unpowered for a long time and the battery died, so I had to reset the BIOS. After I reset it and powered up / down, the same thing came back, "F1 to continue, blah blah blah". I set it up, went to Windows and pressed F8, canceled the resume from hibernation and started fresh, then hibernated it again.
CMOS jumper on motherboard is set wrong -- make sure it's not in the CMOS_CLEAR position
Battery is bad -- make sure it can still hold a charge and power your BIOS for a while
Hibernation is messing it up -- start fresh once it works and then rehibernate