Correct time on the computer

[Calli]

I know that if a computers keeps losing time, it's time to replace the battery. The opposite has me puzzled. Both computers (in different locations) in our house gain time. Every 4-6 weeks, I have to reset them as they will be 5-8 minuts faat. Is it the house current or something in the pc's?

[PrntRhd]

Computer make lousy clocks, the applications they run can make the Windows clocks change time, when rebooted they revert to BIOS time clock.
XP has internet time correction, other OS can have correction programs added. I use NIST Time to sync the computer to the Atomic Clock in Boulder Colorado it is a free program and service, it can correct both the BIOS clock and Windows clocks to nearest .25 seconds.
NIST Time (http://www.boulder.nist.gov/timefreq/service/its.htm)

[rond36]

In Win XP you can choose to sync time with time.windows.com or time.nist.gov

[ziba-june]

[QUOTE]The PC clock is in your CMOS chip ( actually on a SRAM chip, NVRAM) which is kept upto date by the battery. Most of the time when the battery is low the content of COMS is set to default and date/time would go back to Jan 1 ... If time is fluctuating, then you either have some software that is effectiong it or NVROM is misbehaving