Windows 8 VPN not working - error 720

I am running the RTM version of windows 8 on my laptop and get an error code 720 when I try and connect to my VPN service. The VPN worked fine for a few weeks and then stopped working giving me the "Error 720 - A connection to the remote computer could
not be established." I've switched VPN servers and turned off firewalls which have not resolved the issue. I'm hoping that it is just a bug in the yet to be released OS because before I started receiving the error 720, internet connection sharing would not
work using the VPN either. Has anyone experienced the same issue and know the fix?

Dear all ,
I have been working to solve this issue like 2 month ago , and I was sure that this is somehow of a miss-configuration, Managed to solve my problem by checking what I have installed as software and such .
I Wasn't pretty sure what is the software or what was the software causing all the issues , but in my case it was Antamedia DHCP server which wasn't even compatible with Win 8 yet 
now please this is only for professional IT users , those who cannot handle this kind of configuration don't do it , as it may damage your whole system , our work will be in the Registry editor , 
Run --> regedit --> locate the following registry subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-
08002BE10318}
now the trick is to backup this file by exporting it and saving it somewhere ,and after you have to browse the keys for the one installed by your software and causing all the issues .
any one not abling to locate the key just send me the export file or post it here as a reply and maybe I can help him fix it , I know how annoying this issue is and that's why I'm offering my help , and in case of non professional users I may
be able to help them remotely when ever I'm online just send me an email on [email protected]
Please remember to mark this as answer if it works thank you and hope it helps you all from all over the world
Moustafa Chouraiki
Infrastructure Engineer
Softflow , Lebanon , Microsoft Partners .
(ActiveDirectory , Win 7 ,Win 8 , TMG  , Lync 2010, SEP ,Exchange Server 2010 )

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