Date/Time settings not holding.

Windows has nothing to do with CMOS or the battery. If it is not retaining it's memory, it is either the battery or CMOS has become corrupted somehow which would require reflashing the BIOS.

It is the battery, be thankful you don't have mine to replace

half underneath a 2" Northbridge heatsink and requires a half hour to replace  
**Edit Fan normally has blades cooling the waterblock, I took it off so you could see the battery**
Moto

I will also say its the CMOS battery/possible corrupted flash on the bios. Another thing you should check is the windows time, go to the internet time box and make sure windows isn't set to sync with an internet time server. Depending on your bios and software on your PC (something that allows you to modify some BIOS settings wile in windows) there is a possibility that windows time sync could be conflicting with your BIOS time and causing this. Ive seen it in the past but im not sure what brand motherboard it was.

Thanks for your interest in my problem, but how can i reflash the BIOS.

The first step is to check the battery,
if that is not the solution then we can look at flashing the bios,
we'll need to know your motherboard manufacturer and model for that though
Cpu-z will tell you if you don't know already
Moto

Sorry for troubling you, it was the battery,THANKS.

No trouble at all mate, glad to help :-)
Moto

Best answer selected by operfler.