Preventon Antivirus is a clone of Digital Defender now owned by UtilTool (a doggy company that develops rogue products) uses VirusBuster AV engine.
They also have their own AV product based on Digital Defender called UtilTool Antivirus.
Other clones include Clearsight Antivirus, Avertive Antivirus and Celframe Antivirus.
In my opinion they all are crap.
The only VirusBuster based AV that is any good is Outpost Security Suite.
Thanks.