Windows 8 Error 720 – Problem with Connection


Windows 8 is the latest and greatest operating system from Microsoft, but with that said, there seems to be a particular connection issue that is being reported by some users. This problem is known as “Error 720” and will be solved in this article.

What is Error 720?

Error 720 is the classification of the error message that pops up when you attempt to establish a connection to the Internet; this applies to attempted connections to VPNs as well. The message reads as follows:

  • •Error 720 – the connection attempt failed because your computer and the remote computer could not agree on PPP control protocol.

The key word that you should get from this message is “protocol” as you will need to reinstall the TCP/IP protocol in order to fix the issue. Some users may find that their WAN miniport drivers (found under Device Manager >Network Adapters) has exclamation marks. In this case you will need to follow all of the steps in this guide rather than just a select group.

How to Fix Error 720

The following steps include: uninstalling and reinstalling TCP/IP protocol if there are no WAN miniport drivers found; else you will need to remove one of the drivers after uninstalling TCP/IP protocol before reinstalling.

Uninstalling TCP/IP Protocol

1. Press the start button then go to Control Panel > Network and Dial-Up Connections > Right-click Local Area Connection > Properties.
2. Locate Components checked are used by this connection > Internet Protocol (TCP/IP) > Uninstall.
3. After uninstalling Internet Protocol restart your computer.
Removing the Problematic WAN Miniport Driver
Before reinstalling the TCP/IP protocol, or if you’re unable to do uninstall the TCP/IP protocol in the first place because the option is grayed out, then do the following:
4. Press the start button then right-click My Computer > Properties.
5. From properties go to Device Manager; if you are using an older version of Windows you will need to click on the hardware tab to get to Device Manager.
6. On the Device Manager toolbar click on View and then click on Show hidden devices from the menu list.
7. Now locate Network Adapters and click on the “+” sign next to it. If there are no WAN miniports then you can go right to the “Reinstalling TCP/IP Protocol” section. If you do have WAN miniports and they have yellow exclamation marks then proceed to step 8.
8. Get to the registry editor by clicking the start button > All Programs > Accessories > Run. Type in “regedit” and click Ok.
9. In the registry editor you will need to find this key: HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlClass{4D36E972-E325-11CE-BFC1-08002BE10318}
10. Export this value for later use by right-clicking on it and choosing Export. Name the file whatever you wish and save it to Desktop.
11. You will now need to do a bit of searching. You’ll be looking through each subkey (e.g. 0001) to find which one matches up with your WAN miniport driver with the exclamation mark. To determine which one corresponds, you will need to look for DriverDesc under the Name row and look for the value that is in the same column under the Data row. Once you know which subkey contains the problematic driver, right-click it and delete it.
12. Now you must go back to the Device Manager. Remember to click on View and select Show hidden devices. Go to Network Adapters and locate the WAN miniport that was causing problems and uninstall the driver.
Reinstalling TCP/IP Protocol
13. To reinstall the TCP/IP protocol you will need to go back to Network and Dial-Up Connection > right-click Local Area Connection > Properties.
14. Now go to Install > Select Network Component Type > Protocol > Add > Locate Network Protocol > Select Internet Protocol (TCP/IP) from the list > and finally click OK.
15. Reset your modem, restart your computer, and check to see if the problem is now fixed.


Connecting to the Internet is a critical function on any networking device. Whether you’re working or playing, being able to have the biggest resource in recent history, at your fingertips is a must. The error 720 message seems to be a bit of a problem for users of Windows 8 trying to connect to a VPN, on a Lenovo laptop in particular. The above solution should fix the problem for you. Alternatively, if this guide was unable to help you, try doing a system restore and trying again. Happy browsing!


Author Comments

I am aware that the information discussed in this article is not accurate.  This was written by a contractor that is no longer with our company.  I wanted to give you a little bit of a direction to go as at the moment I cannot recreate the error message again.  When we were experiencing the issue, I was using a VPN connection to a Windows 7 Pro computer that was accepting VPN connections.  VERIFY your VPN Settings on both machines, this error occurred because a setting was not configured properly.  Start with the least amount of enabled options where the connection works and add until you receive the error again to isolate the issue.  Also make sure the router on both sides supports VPN pass-thru.

If you have a confirmed solution to the issue, please post your results for the rest of the community.

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