you can examine and change the bios time
if necessary.  

however, you should check your pc manual for
how to access your cmos/bios settings.

but basically, most motherboard require holding down
the del key while you turn the pc on.  As it powers up
you will see the cmos menu instead of the windows
boot menu.

If the cmos is not staying accurate with the time
then you might need to replace your
cmos battery with a new one.

they are cheap and it looks like a
watch battery somewhere on your motherboard....

if it is not the cmos battery then it could be a
bios virus.  But this is rare these days.....

- db
 I  have a problem with time & date. I keep synchronizing with windows time,
 but it keeps late. For example, now is 1:20 , 2 hours later it says it's 1:50!
 This is very annoying, please help!