>It's in the registry - HKEY_LM\System\ControlSet001\Services\svn. I would make sure that the file size/date of svnserve.exe in your C:\Program Files\Subversion\bin\ directory matches the version in the ZIP file you downloaded.
>

I've check the version of the file there and it's 1.4.6

>>The only one more thing I can try before admitting my defeat again is to delete c:\Subversion, create again c:\Subversion_Repository praying it would work.
>>
>>UPDATE. Nope, now back to the original error
>>Error * URL 'svn://IP address/Subversion_Repository' non-existent in that revision
>
>Try pointing Tortoise at svn://IPAddress/ only.

It doesn't do anything. If I add the directory, then it gives me the above error.