Win8Pro 64 vl installed, KMS activated per instructions provided in this thread, WMC upgraded with free MS key.. permanently Activated. Thanks to ALL contributors. The only problem I encountered was my time setting was wrong, corrected that and KMS activated 1st try. Also successfully installed Office 2013 64 bit downloaded via Bittorrent, downloading my gmail now via Outlook!
Nicely presented. Now if that doesn't stop a lot of the repetitive 'how do I activate...' questions I don't know what will. You ought to add a link to the VL keys and your post about covers how to activate for everyone. Edit: s1ave77 was there first again!
Seems to be a problem at your end. Tested twice and both times sucessfully from my Win 8 Pro test client .
If its a legit pro key then you should be able to activate simply by inserting your key and allowing windows to activate and you shouldn't even need a KMS solution