Antivirus 7 is a new rogue. It replaces Antivir 2010. Like any fake Antivirus software, this rogue cannot removes or detects any malware.
Antivirus 7 detects fake infections on a clean system to scare users. It also installs a BHO to display error messages in Internet Explorer.
If your PC is infected with Antivirus 7 use MBAM to remove the infection or follow Bleeping Computer's removal guide.