hi. It's an old virus, and it usually invades your computer to make you pay money. As you pay, your credit card information is being stolen, and it is later used to steal the money from it. However, even after you pay, the virus does not get deleted from the computer. Here I have written a short instruction on how to delete it (although I still think it may not work for all the versions of the virus):
1. HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon - replace Shell via explorer.exe
2. kill alert.exe process
3. remove $APPDATA\Primary