When does this error happen? For example, on boot or when you have clicked on someting.
I have had that error in the past after the installation of a hotfix, resolution was to uninstall the hotfix.
I have heard this error happening for many reasons, to pin it down, you would need to know if the error happens when you open something, or if it just happens. If it just happens, its likely to be an XP Hotfix issue.
type the error in here
http://support.microsoft.com
There will be a fair few results due to the nature of the error, add in other keywords that describe the situation when the error happens, ie, boot, execute or type the software name that triggers it.
I found this too, as i have a feeling its more helpful and relevent
http://www.vladd44.com/other/irq_error.php