According to reports weirden.com was riddled with malware and spyware all of Dec 2010.
Have you done a full scan of all your anti spyware/malware/virus programs?
Did you have Webroot spyware installed before this started to happen or did you install it afterwards?
Full details of your O/S (XP,Vista, W7 ?)and your anti spyware/malware/virus/firewall programs and the actions you have taken so far, please.
Do you get any popup screens or any unusual behaviour at all?
Have you checked in Task Manager what processes are running?