AV-downloadcenter.com is a malicious domain and a browser hijacker which promotes fake AVDefender 2011 program. The program is malicious as this misleading website. Do not fall for this scam because it only seeks you to purchase its illegal version. Even if it looks like legitimate application this isn’t so. It pretends being reliable security software but it is only an imitation of computer protection tool. Malware shows rogue warning messages that state your PC is severely infected. This is scam and none of the information should be trusted. Choose reputable anti-spyware tool and terminate AVDefenter 2011 in order to get rid of annoying security alerts and browser hijacker.