I am running OpenVPN on Windows and the TAP-Win32 adapter is not coming up, causing the message “Initialization sequence completed with errors”. Whats wrong?
In Control Panel / Administrative Tools / Services, make sure that the DHCP Client Service is started. If the above fix doesn’t work, then it’s possible that the TAP-Win32 adapter is being firewalled. In general, it’s safe to disable the firewall on the TAP-Win32 adapter because OpenVPN makes sure that only an authenticated machine on the other end of the connection can communicate through it. Having said that, there have been reports that certain third party firewalls will block the TAP-Win32 adapter after an XP SP2 upgrade. You can also try changing the ip-win32 setting to a non-DHCP method.
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