I have spyware on my pc called CAD proxy which I can't get rid of. I have swept the pc using Webroot Spy Sweeper which identifies the CAD Proxy spyware each time. I then remove it, but when I reboot each time it comes back. I get quite a lot of pop-ups appearing despite having a pop-up blocker on a google toolbar. Every time I do a search for something in google an extra window appears showing various websites relating to my search. Also, my home page get changed quite a bit although Webroot alerts me of this. I would like to know how I can permanently get rid of this spyware? I have tried various other spyware removal tools via free downloads other than webroot but to no avail.