Hello all. I am a noobie to this forum and thought this looked like a great place to get some good technical advice. I have a Windows network with about 50 Windows PC's running mostly Win 7 with a few still running XP, several 2003 servers and two 2008 R2 servers. We also run a Sonicwall NSA2600 with the full security suite including content filtering and anti-spyware anti-malware. We switched from Symantec corporate to AVG Business two years ago. Earlier this year we had several PC's get viruses and malware which caused quite a few problems so I added Malwarebytes Corporate edition to all servers and PC's to enhance our protection. While we are having a lot fewer problems, I would still like to come in once in a while on the weekend when no one is around and do thorough manual scans on every computer with something stronger, something that might find and repair or remove any problems or potential problems that are still lurking that AVG and MBAM aren't getting. What is some of the best, strongest on-demand or one-time tools for such a purpose ? Thanks in advance.