I'm more inclined to think bloatware. I agree with Terry Brown - check out msconfig. Untick everything that isnt absolutely necessary for the machine to run. Leave antivirus, systray, anything to do with video/audio, and wireless networking if you use it. Remember, you arent actually deleting or uninstalling anything, and if it doesnt solve the problem then siply tick the boxes again.

But it could also be just lack of memory. if you have much less than 1 gig then XP is going to limp along. 512M and it's slow. Mainly because it's letting virtual memory manager have it's wicked way. Not a lot you can do about that unless you have 2 physical drives (not logical) in which case you can override the vmm settings and use the non boot drive as virtual ram. In fact, for older systems its not a bad use of a small hdd (1-10gig) to install it purely as dedicated virtual memory. Not as good as ram, I know, but hey, if its gathering dust and the budget is tight (isnt it always!) then it's better than nothing.

WTM

AS per my first post - you have a driver error - in this case the printer drivers. Uninstall ALL printer software and drivers.

Use CCleaner to clean the registry and repeat several time untill no issues found.

reboot the machine and see if the problem has gone away - then reinstall the printer software.