My computer can boot into either Windows 8 Pro (x64) RTM or Windows 7 (x64). On Windows 8 I get repeated "ARP cache poisoning attack" errors (see attached screen shot) and other errors that I don't see in Windows 7. 192.168.0.19 is my computer and 192.168.0.1 is my ADSL router. I previously had the same errors from ESS 5.2.9 on Windows 8 before I uninstalled it. I have pre-release updates enabled for ESS on Windows 8.