= What to do if the installation of the TAP-Win32 driver fails? =

If your TAP-Win32 driver installation fails with a message such as "The system cannot find the file specified", it's possible that your registry is missing the all-important '''RunOnce''' Key. Windows 2000/XP has a bug that it cannot properly detect new hardware by *.inf files, if the "!RunOnce" registry key is missing. See [http://forums.techguy.org/windows-xp/235959-cannot-find-file-specified-during.html this article] for more information.

Also, make sure that your system is not configured to silently reject unsigned driver installation.

For more information on managing tap-windows drivers look [wiki:ManagingWindowsTAPDrivers here].

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