I have a virus on my computer that is disguising itself as an anti-virus software and the program they are trying to pass off is called "Vista Guardian". It's a virus that continues to pop up a window saying my computer is infected and that I need to purchase additional software to remove the virus. I've had something very similar to this before and was able to remove it successfully with Malwarebytes however I've done a few scans with this and Ad-Aware with no success. Any suggestions? Thanks.