Win7 computer connection VPN prompt error 721 how to do

1. First, let's press the win+R shortcut on the win7 Ultimate computer keyboard to open the running window of the computer. In the open running window, we type regedit and click Enter. You can open the registry editor window of the win7 Ultimate computer.

2. In the open registry editor window, click on the HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Control/Class/{4D36E972-E325-11CE-BFC1-08002bE10318}/< Br>

3. On the “Edit” menu of the open window, point to “New” and click “DWORD Value”, then type in ValidateAddress and press Enter. The default setting of this value is “1”, if it is set to 1, the representative is open, if we set it to 0, it means to close.

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