STUPID SAKAI ANTIVIRUS

Recently,i think it was on a tuesday.....i think so....my comp when all screw-y.......so i scanned the stupid thing............there was like 10 trojan viruses u noe.....so i aso when and downloaded this programe called anti360...........i tell u after that my computer started acting all wierd....when i'm surfing the net suddenly the thing will appear saying THIS WEBSITE IS BLOCKED...........damn sial...........