New PC: Windows 8.1 OS 4.1GHz 4TB
I've shredded a previous Silverlight installation & clean downloaded Silverlight 5 from the official website.
The problem, stated above, is still unresolved.
First I get 'not opening Silver light application because developer not identifiable' upon 'Open', thenif I attempt to 'Run as Administrator' I get 'Unknown Publisher' in 1st. dialog, followed by 'Windows cannot find 'C:\Users\Ang.............'.
Additionally, this exact-same response occurred when I tried downloading Java...
plus; don't know if it's relavent, but; for about a week I've had all browsers (IE/FF/GC) operating incredibly slowly, and giving me myriad 'SSL Connection' error messages. Often I have to download such programs 20+ times before I get a copy that's not reporting a size of zero bytes.
Cheers for any/all assistance with (any of) this folks.
AngusGF