Originally Posted by Ruben
I did notice that using index.php at the end of your url does nothing. It should have run ubb normally.
But http://www.paritech.com.au/forums/index.php/ (with a trailing forward slash) does work.

Originally Posted by Ruben
It might be time to double check all file folders permissions as if this was a new install, before you upgrade again.
I know you are using windows so you may be limited to relying on your host to do that.
Then follow the upgrade directions again.
I will try again when I have some spare time.

Thanks, Paul