I am using ME. And my time clock on my computor is wrong. I can not put it right.  

   How is it that you cannot put it right?  What do you do and what happens?
   If you set the time and it is correct, but then when you turn off your computer and turn it back on, it is not correct, that could be a bad battery in your computer.  The battery runs a clock while your computer is off, so that when you turn your computer back on, the time is correct.  If the battery is dead or low, the time will be off when you turn on your computer.
   If that is not the problem, please give us details as to what is the problem.

Sounds like a dead battery.  Had a similar problem on a laptop.  Finally the laptop stopped working all together.  Replacing a new battery corrected the problem.

Here you can download a free program that automatically adjusts your computer time to the actual time in your time zone:
http://www.worldtimeserver.com/atomic-clock/
I have used this handy program for years. If you set it to start with windows, it will automatically ping the time server you select every day, so you won't have to worry about setting the time manually.

As an alternative, you could try http://www.thinkman.com/dimension4/index.htm (also free) which I have been grateful for, for a long time. It automatically synchronises the PC's clock with one of a number of standard clocks (you get to choose) the first time you connect to the internet after starting up your PC, or you can make it happen at regular intervals or whenever you want. I would definitely recommend it. I imagine it works on exactly the same principle as worldtimeserver.

   Actually, WinXP comes with the feature which synchronizes your clock with the actual time.  I don't think that is the problem here.  The problem is that he cannot set his clock.
   It would be nice if Andy would post back here and tell us what he found out.

Ray, i guess i am responding a little late in this thread but as you suggested it must be the CMOS Battery which keep track of BIOS setting and all when the computer is shut off.