Andre Robatino <robatino <at> fedoraproject.org> writes:
There's a registry hack, which I use on both XP and Vista, and should work on Windows 7 as well, that will make Windows interpret the hardware clock as UTC (search for "registry UTC"). It works fine for me, though I've heard there may be issues with suspend/hibernate (which I don't normally do).
Probably a better search is for "RealTimeIsUniversal" which is the registry key that needs to be set (to 1). When using this on a dual-boot system, I make sure that only the more frequently used OS (Linux in my case) has NTP enabled, since they aren't aware of each other.