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Dell Dimension 8250 PC running Windows XP has CPU always at 100%

I run Windows XP on my system. I formated my HD 4 Times and reinstaled Windows XP 4 different times. My whole system runs slow. I click on a program and it takes 5 min. to boot up. I currently having 100% CPU Usage. I currently have no programs or softawre on my computer. The only things i have is the Drivers that a Dell. Tec. Support agent told me to install. I replaced the Hard Drive and i relaced the Video Card. I also replaced my Wireless PCI card. I don't want to replace the Processor or the MB yet cause that is BIG Bucks. I also Ran the 32-Bit Diognostics test from my Dimension Resource CD. It came back saying that i have no Cache.

Error Code: 0700:0120 No ache Detected. Cache might be defective or not present.

You can also e-mail me at

Please help me I live off the computer.

Thanks in advanced,


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  • Colton Gilbert Jan 03, 2009

    i don't know wha process are using it. Dell doesn't even know. I called Dell but Dell Connect couldn't connect cause i run so slow. I have 512MB of Ram. and i have 2.66 Giga Hertz. I have a 120 GB hard drive and i formatted 3 different ways different times. I formated quick once, formated non-quick once, and i FDISK once when i booted from my Dell Dimension Recource CD. I opened a DOS session and typed in FDISK and manually deleted the partition.

  • Colton Gilbert Jan 03, 2009

    how do i get to the advanced settings? from control panel or what?

  • John Hong
    John Hong May 11, 2010

    Your CPU is at 100 but what process(es) are using it.

    How much RAM do you have.

    How big is your hard drive.

    When you reinstalled, did you do a format (not quick)



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The cache is nothing more than a file on the hard drive, if it is missing Windows automatically creates it. If it was corrupt, formatting would have gotten rid of it. Try booting in safe mode (and afterwards safe mode with networking) to see if you have the same problem. This could also be a hardware issue, remove any cards that have been added (including video, I assume it has an onboard chip) and see if it helps. If any of this helps, it gives us the info to fixed it permanently.

Posted on Jan 03, 2009

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Dear sir

it's memary related problem if yr all setting is ok then just test replaced yr RAM then chek it.. and first of all try 1 thing... u have to chek CASHE memory status on yr bios whitch is in advanced settings u have to chek fisical cash and cpu cash mem is ENABLE or not.. if yr pc has inter cash mem problem u need to change yr mother board it's bad but tru otherwise try to change yr RAM then try... It's Help u...:)

please vote

Posted on Jan 03, 2009

  • Chinmay Joshi
    Chinmay Joshi Jan 05, 2009

    dear sir

    advance setting is in bios which is in mother bois program when system power on just press F2 or DEL then it's show a bios menu when bios menu appier there is copple of opction show u have to find advanced setting or in some ware found " INTERNEL CASH" and "CPU CASH" and make is sure both are ENABLE if both are enable then try to install windows in other partation then chek it it's help u...:)


    please vote




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