We have a 2 year old Windows 7 PC, fully patched, on a domain. It runs our security software at a museum, Win-Pak Pro. It seems to have a time issue. We can set the correct time in BIOS, and in Windows but usually, within 30 minutes of booting, the OS and/or Win-Pak are an hour ahead. We can fix the time, but soon it jumpts again.
It is in the correct time zone, DST is set, we replaced the CMOS battery on the main board. I disabled all Win-Pak services, fixed the time and rebooted and the OS time still jumped ahead. The PC is on DHCP and gets its time from the DNS server. None of the other 30 or so PCs on this subnet, or 240 plus on this DNS/time server have the same issue.
My last idea is to move the hard drive to another PC we bought at the same time to see if I can isolate the issue to software on the PC or on the main board.
Any other ideas?