Hi Steven, just want to report, that I have the same problem as you with the new WideClient on totally eleven older laptops with win2K Pro installed supporting my main Win7 computer. The laptops have no security tools, six of them have only Win2K Pro, WideClient and vasFMC installed representing the avionics, further five laptops have Win2K Pro, WideClient, registered FSUIPC, WideView and FS9 installed for the outside view.
The task manager shows WideClient for a few micro seconds before closing it again. There is no chance to run it. The last version runs without any problems.
As I don't want to buy six, or even eleven new operating systems, I decided to reinstall the previous running WideClient again, so far. Hoping for not to be limited to much by missing the new features.
Regards Remy