| 105 | |
| 106 | = Debugging installation problems = |
| 107 | |
| 108 | People occasionally report tap-windows installation issues, assuming they are all caused by a single bug, because ''devcon.exe'' gives the same error message/code. This is unfortunately not the case, and the reason for a install failure could be: |
| 109 | |
| 110 | * Lack of privileges for installing the driver(?) |
| 111 | * Broken driver |
| 112 | * Invalid driver signature |
| 113 | * Expired driver signature |
| 114 | * Conflicting drivers: pretty much every OpenVPN-based VPN service has it's own Windows client installer, which install some version of the tap-windows driver. If the installers do a bad job, they could end up installing tap-windows drivers that conflict with the official OpenVPN tap-windows drivers. |
| 115 | * Something else |
| 116 | |
| 117 | In case you have tap-windows installation issues, you should try the following: |
| 118 | |
| 119 | 1. Back up all OpenVPN configuration files, both for official and for unofficial OpenVPN Windows installers |
| 120 | 1. Uninstall the [http://openvpn.net/index.php/download/community-downloads.html official OpenVPN Windows client] |
| 121 | 1. Uninstall any unofficial OpenVPN Windows clients you might have |
| 122 | * Note that many of these are not called OpenVPN at all |
| 123 | 1. Remove all instances of tap-windows drivers, if possible |
| 124 | * Note that many of these are not called tap-windows at all |
| 125 | 1. Reboot |
| 126 | 1. Try installing OpenVPN using the official installer |
| 127 | |
| 128 | If you're still having issues installing the tap-windows driver, you should try installing it on another computer. If installation to another computer works, it's highly likely the problem is in your system, not in the OpenVPN/tap-windows installer itself. |