Why is my Clock out of synce (faster)

Why is my windows clock somtims to fast and then gets out of sync before i notice and set it back. Doesnt happen all the time, some days its fine.

Never happened when I switched the PC on and start windows the first time, the time is what it should be but after a few hours its wrong (somedays not always).

No ideal why!

This has been like this for 4 months now. Battery volatge is fine (plus the mobo is not even 2 years old)

Check your CMOS battery. Most likely it is dying or is already dead.