This is a VERY odd one! The past few days, my desktop machine has been "losing time", and I've been having to literally set the proper time each time I sat at the thing. I actually paid attention to it this time, and it's not just losing time, it's running BACKWARDS! :O Ad 9:00 this evening I set my cell on the desk, set the time to the proper value on the computer, then played some Minecraft. About 10 minutes later, I looked, and the cell said 9:10PM, while the computer indicated it was 8:51PM

I suspect it's the CMOS battery, but as I haven't shut the computer down, this also makes little sense. I'll swap it out anyway, tomorrow, and see if that helps. I'll keep you all posted. Have any of you blokes come across this before? I have, with computers that lose time when shut down, but not while they still run.

I've never known the clocks run backwards like yours is but I've seen plenty of other problems with the clocks, I think you are right to suspect the battery, certainly try a new one 

I've had the time go screwy due to CMOS batteries expiring, can't say I noticed it went backwards though.

Nothing like the good old days.   I've replaced some batteries  but not because of problems with the clock.   I do have a radio that after a power loose is supposed to make a reset when the power is back on. It took a while and realize the reset time is 1/2 hour off.  It has different setting for different time zones but the closest I can get is off.
Carl2