Install and run the anti-viral ASAP....then ..... Go to Gibson Research Center http://www.grc.com for a free online evaluation of your system's vulnerability.
Download the free version of Zone Alarm, (vital for all T's and DSL.) Trace back the URLs it records through http://www.samspade.org you will be shocked at the number eminating from China, Korea, Russia, and the Slovakias; hundreds in a week of 24/7. It IS a jungle out there!