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Old 01-08-2009, 07:58 AM   #2 (permalink)
justpassingby
Moderator, Microsoft Support
 
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Join Date: Mar 2007
Location: Belgium
Posts: 6,219
OS: XP Home SP3 / Ubuntu

My System

Re: constant 100% cpu usage

Hi garypriceomaha and welcome to TSF !

Is this a Gateway, what's the exact model of the computer ?

What firewall/security suite do you use ? If you connected to the internet without any firewall you could already have gotten some malware, even if you didn't run your internet browser. Did you use an XP SP2 or XP SP3 CD to reinstall ? The USB drivers are part of SP2.

Make sure you've installed the chipset drivers before installing any other drivers. More on that once we know the exact model of the computer.

Enter the BIOS at startup (look for some "press xx to enter setup" message), find the hardware monitor or pc health screen and report your temps, voltages and fan speeds. An unsufficient supply or an overheating cpu can cause cpu usage to max out for no reason. Open the computer case and clean all the dust on the fans and heatsinks.

Make sure you have installed all the latest critical updates using windows updates. The windows update process will be looking for update and will take some cpu usage until all the updates have been installed.

When doing a fresh install you should do the things in this order :

0) download the latest chipset, video, audio, network, ... drivers for your motherboard and other hardware devices from the manufacturer's website. Download the standalone installer for SP3 (if your install CD doesn't have SP1 you'll need to install SP1 or SP2 beforehands so download them if needed). Copy them all on a CD.
1) format and reinstall XP using the CD that came with the gateway computer (a retail CD won't have the proper drivers).
2) install the latest chipset drivers then all the other drivers
3) Install SP3
4) enable XP's integrated firewall before you turn the wireless router on or connect the ethernet cable
5) connect to windows update and install all the critical updates.
6) download a free antivirus (Antivir, Avast or AVG) and install it
7) install the remaining programs

If you want to give it a last try uninstall and remove the PCI USB card and re-enable the onboard ports in the BIOS before you reinstall XP. Restart the computer each time you're prompted to do so (after installing the chipset drivers, the updates, the antivirus, ...).
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Malware removal steps. Post your logs there and not here !
Posting system specs

Last edited by justpassingby; 01-08-2009 at 08:04 AM.
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