Just in case anybody is interested

http://www.thinkman.com/dimension4/index.htm

And for the record, Tom, is relevant to the OP's question because it
concerns your PC's clock keeping accurate time. It is a solution to the
problem. What have you to offer?



"w_tom" wrote in message
...
Why so many "it might be this" or "it might be that" or
"time is updated from the internet"? Every posts says nothing
useful AND does not answer the OPs question. OP even
clarified the question when some replies were rubbish.

The answer -- technically -- was posted without
speculation. Processor hangs obviously do not affect that
clock operation - it one first learned how something works
before posting. The OP posted this - a technical question
that required technical knowledge before replying:
Why do the battery powered clocks in personal computers tend
to keep worse time than quartz watches, even the $1 ones?

See that word "might" ? That word "might" means the poster
does not know the answer and therefore should not have
posted. Anyone can speculate. But even worse, he posted
without reading the answer that was already posted. He did
not read every previous post before replying. A program
called D4 is equivalent to telling us when that mountain will
fall - not relevant to the OP's question. Most replies were
just as useless as this one. Why? How can so many post when
they never bothered to first learn how a computer's battery
powered clock even works?

DBLEXPOSURE wrote:
Because the processor in your computer might hang or busy itself
with other things besides keeping time. It may also have
something to do with the clock pulses your computer uses not
being exactly divisible into real time.

look for a program called D4. It is a free download and will keep your
clock synced to universal time. Also, Widows XP can sync to the same
time
servers that D4 uses. Both work great!