I actually had a lady bring me in a laptop today which she said was having this same issue and same error message..now I didnt test this before working on it as if it was infected with something I didnt want it to spread on our network
Weird thing was I ran spyware scans with ad-aware, spybot, ms defender beta 2 and they all came up clean..installed virus scan software with updates and nothing..I just ended up deleting all temp files, removing all items from start up except virus scan, installing service pack 2 for XP, all security updates, and was then able to surf the net fine for 40 minutes with no error messages.
What are your OS specs and service pack level? What type of spyware/viri software you have installed?