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Why is my PC's CPU always running at 100?

Slow system with 100% CPU, but system process is the only process running which takes 99% of the CPU?

  • In fact, normally the system shall be idle after computer start up and the system idle process will take 99% of CPU when nothing is running. But my situation is just opposite which causes my computer almost not functioning. If I terminate the system process, my computer will be shut down right away. My anti-virus and spyware programs did not detect anything. What might be the causes? Any suggestions to fix this situation? My system is AMD Athlon 3200 running with Win XP Prof. Thanks for any input fixing this problem...

  • Answer:

    I use to have that problem, and it turned out to be my network driver (i think), so you should try to update as many drives as you can. BUT IT IS CAUSED BY A DRIVER, IT TOOK ME 4 DAY TO FIND OUT WHICH ONE THOUGH.

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well for one thing ... what type of programs are you running and when is your system looking for updates (cookies. xp upgrades, other programs). you might not have viruses or maleware running.. but if you have programs looking for updates that can take a lot of system resources

tonguering180

Hi. You could try a 'System Restore' to a date before the problem started. It sounds off hand like a registry problem, perhaps caused by malware. I've had good luck with ' Advanced WindowsCare ' which is free for the personal version. http://www.iobit.com/AdvancedWindowsCarePersonal/index.html

Cirric

excess cpu usage can occure when a program is closed out of before it loads completely. if you get tired of waiting and x out that leaves an opening for memory leaks. Add more ram too, i was using 100% added another 256mb of ram and now use 2-10% cpu. Do a disk clean up and a defrag session. dfrag the drive several times too not just once. usually (C:) drive.

dawn b

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