Windows XP, MSCONFIG, Startup, HTML Code

I have a client that has a Windows XP Home machine that we recently repaired a virus on. There is a strange probelem that I have been unable to figure out.
When I start MSCONFIG and look at the boot up programs, several lines contain HTML code that as far as I can tell just represents a “page not found” page. I uncheck these items, but when the pc is rebooted, they come back checked again. It appears to have no effect on the system, but that doesn’t make me feel any better.
Norton Anti-Virus and AdAware don’t detect anything that I should be concerned about.
Also, the System32 Folder loads at boot. I learned how to fix this on Microsofts Knowledge Base, but am not sure the problem is related or not.
Has anyone else seen this??? Any ideas on what is going on?