I have no idea. Do you mean some software is making small bug like images appear to crawl around on the display screen?
Or do you mean actual, living, small insects crawling on the monitor display screen?
Please show us a screen print if it is bug like images. ImageShack will let you upload an image and post the url address here.
What do you use to protect your computer from viruses, spyware, and hackers?
What is causing "bugs" to crawl on my screen...is this a virus?
I have Windows XP, Version 2002, Service Pack 2, HP Pavilion a1606n.