Do I need any other anti-virus/malware/spyware on my machine in addition to Prevx. Currently, I'm running Prevx with Malwarebytes and WinPatrol? I was also running Zonealarm but have had to remove it because of stability issues. I've just started using Prevx after my original antivirus, Zonealarm failed to stop malware and spyware getting onto my machine and then finding it once it was on my computer. I had to download and run a lot of antivirus programs to remove all the malware that had gotten on my machine (this was from downloading freeware programs from sites like CNet, PC Brother, Wareseeker and the like). It took Prevx to find the last of the viruses and fully (I hope) clean my machine. Zonealarm now clashes with a lot of the antivirus software I have on my machine, even though they are, so far as I can tell, inactive. To the best of my knowledge I've stopped them running both at start-up and cleaned out any entries they made in the registry. However, ZoneAlarm keeps claiming that programs like AVG and Microsoft Forefront Client Security clash with it. This clash was rendering my preferred browser, Firefox Mozilla, unstable. So I decided to remove ZoneAlarm from my machine. I wonder if in addition to Prevx (I have the full, paid-for version) I need an anti-virus program running to maximize security on my machine. Presently, I have a paid for version of Trend Micro along with the free version of AVG. I would welcome any advice on this issue, especially any experience Prevx users have with AVG or Trend Micro along with Prevx. In addition to Prevx, I am also running Malwarebytes (full, paid-for version), WinPatrol (free version) and Hitman (free version). I thank forum members for any help they can give. I very much appreciate it. Thanks, in advance.