Having gotten past BUG#202, I ran into another unexpected error - my lack of PDO extensions in PHP.
I managed to enable the extensions (after Googling for advice on how to), so my suggestions for this stage is this.
Tell the user to find the lines initialising other extensions and to add the following:
Providing this information straight-up and without expecting the User to investigate how to execute the steps described in somewhat misleading text (ie in Unix, you drup the "php_" prefix of the extensions) would be great.
(In ) - fix #5630 now displaying a user friendly error message