I have a client running Server 2008 R2 Std with ESET Business Antivirus and we just ugpraded them to version 4.2.64. Once we did this Windows 7 workstations on the network get slow access speeds to files on the server. XP Workstations do not seem to be affected. If I uninstall ESET on the server the performance goes back to normal. I am going to install version 4.0 to confirm it is isolated to the latest edition, but wanted to check and see if anyone else was experiencing this issue?