
It will display a message similar to this one:
"Uncertified (program name) antivirus software detected on your computer. You need to remove (antivirus name) software for correct operation of the Antivirus.
Attention: If you don't remove (program name) software, the performance of your computer will dramatically degrade.
Press "OK" to remove the (program name)"
Whether or not the user presses OK, the virus will uninstall the antivirus software from the computer. Rather than keeping the legitimate software, the virus will throw that one away and begin to download its own antivirus software. Once the new virus is downloaded, according to Symantec, it will try and tell the user that the system will explode because of all the fake malware, and it will try and get you to pay to fix it.