The other day I noticed alot of pop-ups, most of them said at the bottom, "This ad brought to you by Web Buying." I use AVG, and it didn't pick up anything. I downloaded spybot, which found alot of spyware. It deleted all but two, Altnet and HotSearchBar. It said files were in use. I restarted in safe mode, and tried to delete them that way, but still no luck. Now I have 7 problems found by Spybot. They just keep coming back. My AVG has just picked up a trojan at C:\WINDOWS\TK58.exe. I deleted it, but it shows up again, so I would assume there is something else on my PC sending it. Any suggestions?