I had the exact same error using Wordpress on a different IIS/Win server. I contacted support and although I am not sure what they did exactly they were able to correct the problem and I was able to then run the latest version of Wordpress.
I guess I replied your ticket. For others trying to install Wordpress 2.3.3 on Windows hosting accounts, they should install Wordpress 2.3.1 and upgrade to 2.3.3 from there.
I must say, WP might take “5 minutes” to install as they say, but it then takes a couple of days to debug. As soon as I wanted to use a new feature of it, I had to look up how others got it to work without problems.