you were looking for Photoshop 9 and downloaded a 851.7kb file?!
I'm not trying to be mean here, but you deserved what you got. Do you realize how BIG a file Photoshop 9 would be??
Here's a clue for some: If you're trying to download something like that, go by the official site and start the download for the free demo. That should give you a ballpark idea of the size file you might be looking for. As a matter of fact, look for something even bigger than that, as most demo files are missing features.
Let that be a starting point.