Windows – All created VPNs result in Error 720

vpnwindows 8

I have a few different VPNs I need to connect to. I'm using windows 8 and standard ptpp VPN. Every VPN I have created though results in the same error:

Error 720: A connection to the remote computer could not be established You might need to change the network settings for this connection

The VPN works in Windows 7 and XP. I'm not sure if this has something to do with my new laptop or if its something with Windows 8 itself. Any help would be greatly appreciated and if there is any extra info I can provide please let me know.

Edit:
I've tried with virus scanner turned off and windows firewall turned off as well and I still receive the same error message.

Best Answer

Got this problem after migrating from Windows 8 to Windows 8.1. It was due to altered miniports which had to be reinstalled.

Here is how I managed to do so:

  1. Locate broken miniports [yellow icon]: Device Manager -> View -> Show hidden devices. I had for example 3 bad miniports: WAN Miniport (IP), WAN Miniport (IPv6) and WAN Miniport (Network Monitor).
  2. Regedit -> HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class{4d36e972-e325-11ce-bfc1-08002be10318} -> Export. In the generated .reg file, locate the broken miniports. You will then identify all the subkeys which need to be deleted [for example in my case, subkeys 0039, 0041 and 0042]. Double check that those subkeys has a "DriverDesc" which matches our broken miniports... And delete those subkeys.
  3. Go back in Device Manager, and right click on a broken miniport, then "Update Driver Software" -> "Browse my computer" -> "Let me pick driver from a list" -> uncheck "Show compatible hardware" and wait for drivers listing generation... Then pick the first "Microsoft" drivers listed [BlueTooth Personal], and ignore warnings. The broken and undeletable miniport will then become a fake bluetooth card, which you will be able to delete.
  4. Repeat point 3 for all broken miniports.
  5. And reboot the system. The OS will create again its miniports from scratch.
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