Weird Computer Screwup

I was sitting on my computer about 10 minutes ago, when IE starts opening mutliple windows, all blank ( i think)

i tried doing a mass closing which worked until it started again ( it got up to 50 windows open)

to solve it, i got offline, didnt fix it
so i turned off my computer. no more windows.

anyone want to venture a guess on what the hell happened?

i ran my scanners ( virus, spybot) and nothing pickedup.