Clock "slows down", yet is able to manually sync correctly

Thanks Poolmon. I don't run AOL, but I did uninstall/reinstall some other apps I had recently installed, to no avail. HOWEVER, out of desperation, I tried what Microsoft tells you and rebooted a few times and to my amazement - it worked! Clock is ticking away like it should and has been for about 16 hours now. I'm at a total loss to explain it!

I also had this issue, the clock was visibly running slowly. After reading this thread I did a few reboots but I'm not sure that fixed it.
However it ran its battery down overnight in sleep mode, and this morning, after powering it up, the clock is running normally.

So now, after completely resetting the computer (because of moving to another machine) through Windows 10 settings and after all the recent updates, the problem still persists. The quick and clear fix for me is to not use the sleep mode and only shut down the computer if neccesary. This problem affects the clock, video playback, some programs and most of the games I play. For example, in Starcraft II, the game works otherwise as intended, but the speed of gameplay is very slow. I first though that this was because the lower difficulty setting I chose in the campaign. Can't really think of the reasons this could happen .

Szark said:

So now, after completely resetting the computer (because of moving to another machine) through Windows 10 settings and after all the recent updates, the problem still persists. The quick and clear fix for me is to not use the sleep mode and only shut down the computer if neccesary. This problem affects the clock, video playback, some programs and most of the games I play. For example, in Starcraft II, the game works otherwise as intended, but the speed of gameplay is very slow. I first though that this was because the lower difficulty setting I chose in the campaign. Can't really think of the reasons this could happen .

Jitter - Wikipedia, the free encyclopedia

Electromagnetic interference - Wikipedia, the free encyclopedia

vlbphoto said:

Jitter - Wikipedia, the free encyclopedia

Electromagnetic interference - Wikipedia, the free encyclopedia

Thanks for the interesting links, but if it's related to the actual physical components of the computer, then...

... why did it start after upgrading to Windows 10?
... why does not using sleep mode and shutting down the computer work? and restart cures it?
... why doesn't my new computer have it even though it's on the exact same wall connection?

Joergi said:

It might well be that the CMOS battery is getting empty. Before you get a new one, you can also try the below procedure:

This issue can be caused by the Windows Time service being corrupt. You can try to take the following steps to troubleshoot this issue.

Run the following command in an elevated command prompt: net stop w32time
w32tm /unregister
w32tm /register
net start w32time
Then, please restart the computer to test the issue again.

If any error message was received when doing these steps, please let us know.

This worked like a charm on my windows 8.1 nextbook tablet Jeorgi!!! You Rock!!!! TY!