My CPU is always running at 100%

[Grynch999]

I installed SP3 for windows xp and out of nowhere my CPU starts running at 100 percent all the time when nothing is even happening.  My system idle will say 99% meaning my CPU should be able to use 99% percent more processing power than it is, but the CPU usage is constantly at 100%.  So I wiped my computer and reinstalled windows XP, and got all the updates and it always messes up when I installed sp3.  So I tried again.  Wiped my comp and the same thing happened when I installed SP3.  Is anyone one else having the same problems or have any advice?

[Geek-9pm]

Thank you for sharing that with us! 
But tell us, was it OK with SP2? 
Why do you want to use SP3?
I have it on one machine and it works good. On another it really messed up and I had to give it up. 
Do a Google or Yahoo on "SP3 woes, exact phrase. On Google I got 4,830 hits on that phrase. Of course, 4,830 people maybe are wrong! 

[patio]

Where are you getting this info from ? ?
Depending on which window you are looking at 100% should be the number...

[macdad-]

I installed SP3 for windows xp and out of nowhere my CPU starts running at 100 percent all the time when nothing is even happening.  My system idle will say 99% meaning my CPU should be able to use 99% percent more processing power than it is, but the CPU usage is constantly at 100%.  So I wiped my computer and reinstalled windows XP, and got all the updates and it always messes up when I installed sp3.  So I tried again.  Wiped my comp and the same thing happened when I installed SP3.  Is anyone one else having the same problems or have any advice?

seems to be that theres a rogue proccess that is always using the CPU time. Grynch, bring up your Task Manager(by pressing CTRL+ALT+Delete and hit 'Task Manager' on the Windows Security Dialog Box), goto proccesses, and give us a list of all the proccesses running.