Our organization purchased ES4 two years ago and installed it on Windows 7 workstations. We are now looking to upgrade the OS to Windows 10. I am testing the installation on an isolated test network and have attempted it on virtual workstations (using VMware 5.5) as well as a physical workstation, all running Windows 10. It seems to progress just fine until time to enter the license key. I enter our key (again, purchased 2 years ago) and after chewing on that for several minutes it returns an error saying the key is invalid. Does this installation require internet access? Other reason the license key would become invalid? Windows 10 compatibility?
Thanks.
Mike
USTRANSCOM Test Engineer