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Old PC - New PC? Also, make sure it's the bios time not changing and not just the Windows OS time not changing.
Typically a bad CMOS battery would register it back at 12:00 am and the 1/1/200, typically. Could be a CMOS battery - most newer PCs have a Quarter sized flat battery for power. You can get it at Radio Shack for 3 bucks. I forget the part# but usually a CR34032 number is stamped onto the battery - be careful of the retaining clip - too much pressure will break it. After that, you may want to dowload the lates motherboard bios and update the BIOS - this can unscrew-up a bad bios file (which does happen)... Be real carefull on a BIOS Reflash , especially if you've never done one before...
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