Not having any issues at the moment with Version 4.0? Seems to be going good here... All my servers are 2008 server A few 2003,2000 Servers Desktop clients are all Windows XP SP2 and SP3 My File Cluster Server is not taking a performance hit.. I got an RDP session into it right now watching ekrn as I copy and paste over a large with encrypted packers *plus a whole state agency is writing to it also right now*.. I'm not saying you guys having issues are doing something wrong.. I just don't want people thinking it's the norm. Yeah I have criticisms of NOD32 sometimes but I do anything can be improved is my mindset, and I state my opinions..