make sure you have a decent virus scanner with up to date defintions, i recommend Norton Antivirus but if you cannot buy anything, use Avg free edition 7( http://www.grisoft.com ), download hijackthis( http://www.spychecker.com/download/download_hijackthis.html ), spybot S+D( http://www.spybot.info ) and adaware SE personal edition( http://www.lavasoft.com ). Run everything and one of those should do the trick