Hi folks, I finally nailed a problem I've been having with my network. It's ESS Firewall causing it. Versions; 18.104.22.168 on both PCs. Both PCs are Win 7 Pro 64-bit, connected via a nethear gigabit hub and both cards are connected at 1Gbps. I was seeing network traffic as in the attached file when copying data across shared drives (not Homegroup as I don't use it): Once I turned off the Firewall on both machines I got no pauses and the network utilization remained at ~75%. Any thoughts as it's a very annoying issue as sometimes those pauses can last minutes. Cheers, Paul.