Antivirus live is a rogue antispyware application on the same platform like cyber security and system security. It infects system by drive-by-downloads, shareware or infected websites. The difference is that Antivirus live uses a bit more complex way to protect its executables against removal and removal software.
First of all, Antivirus live enables proxy server in the common browsers. The server either goes through Trojan process on localhost or through infected websites. This allows manipulation of search results and inserting various popups into web pages. This hinders downloading of anti-spyware applications as well.
Second, Antivirus Live processes disable launching of other, non-white listed executables. Thus it is harder to get rid of antivirus live while process is active.
To get rid of Antivirus Live, you have to disable its processes. There are couple ways to do so : First, start task manager right after logging in into windows (while Trojan has not launched). Keep pressing ctrl+shift+esc . Then stop all processes that end with sysguard or other processes that should not be there. Second way is using safe mode (press F8 on boot up). If it fails, download process explorer from Microsoft (you might have to rename it to .pif ) and try using it.
Second step of Antivirus Live removal procedure is fixing your browser. For this simply disable proxy server and empty hosts file on your PC. Overall, it is good idea to disable add-ons of unknown companies as well.
The last step is removal of infected files. Although you can search for them on hard disk (files ending with sysguard.exe), the better approach is to download and install good Anti-spyware application. Personally, I recommend Spyware Doctor for Antivirus Live removal and keeping your computer protected from similar parasites in the future. Other good choices include superantispyware and malwarebytes.