20-100% CPU Usage (all of the time)

Microsoft Windows xp home edition with s...
May 17, 2010 at 17:40:00
Specs: Windows XP
Hi, my CPU usage is constantly between 20-100% even when I am doing nothing or simply web browsing. I've tried to following with no change:

- virus scan
- spyware scan
- disk cleanup
- disk defrag
- disk error checking
- stopped all non-essential programs on start up

Additioanlly, my pc is slow at loading up (I recently timed it taking 3mins 40secs to open firefox from the moment I pressed the power button).

Do I have a problem?

See More: 20-100% CPU Usage (all of the time)

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May 17, 2010 at 18:16:59
Yes I would think you have a problem :-) concerning the cpu utilization. Boot time is relative and doesn't count.

Please list the programs you have used.

Excellent job btw in troubleshooting the issue.

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May 17, 2010 at 18:49:57
Did you look in Task Manager to see which program is hogging the CPU?

Which anti-v program?
Which anti-spy program?
How much RAM?

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May 17, 2010 at 19:54:20
Taskmanager and performance monitor are built in.

See some of systernals tools also for more details.

Might see that you have enough free space on the hard drive.

See also that bios and memtest show ram as what it ought to be.

Might be time for a clean install. Rootkit tools can't even detect rootkits anymore. The only way to clean them is to do full clean install.

Playing to the angels
Les Paul (1915-2009)

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Related Solutions

May 17, 2010 at 21:30:30
What are the odds it will be McAfee or Norton? (hogs themselves and not as good as they should be at what they are supposed to do)

You have to be a little bit crazy to keep you from going insane.

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May 18, 2010 at 04:52:48
One thing that is constantly hogging the CPU (i.e. around 20%) is AVG... even when it isn't running a scan. Also, since posting I have turned off automatic updates - whilst start up is just as slow, the pc is more more responsive when doing tasks.

In regards to a clean install, what is it and how do I do it?

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May 18, 2010 at 14:06:09
A clean install is you taking your oem disks or restore dvd or any way that returns your system to what it was when you bought it. Sadly Microsoft seems to have had problems with their OS's from W95. When you install the basic OS the thing works great. Once you start loading apps in it starts to slow down. MS did that to put a grip on anyone trying to write to their "registry". As registry gets bigger and has issues like left overs and mistakes your system gets slower. Every program tries to make it look faster so it loads up a bit of software. Since every one does it the system gets slower still.

You will notice that a clean install will speed up your system a bunch if there is no hardware issues.

Playing to the angels
Les Paul (1915-2009)

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May 18, 2010 at 14:33:57
I had the same problem with the computer slowing down while browsing. I traced it to AVG anti-virus. I had used it for almost a year with no problem, but after one or two updates, it just took up too much resources. I removed it and downloaded another free anti-virus (Avast) and my computer began working at normal speed.

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