Kingdoms Installation Error - PLEASE HELP!

[zzmasta]

I used to play Medieval 2 vanilla without any patches. It worked fine and I never bothered looking for them. After passing the campaign I stopped playing until I found out the expansion was out and picked it up.

When I went to install the campaign, it told me there was an error updating. A google search indicated that I needed to download patch 1.2, apply it, and then run the set-up. I did this and it worked, I didn't get an update error but instead when it began running the Americas Campaign installation, I got an error saying "X file does not match the one in the bin" or something to that effect. It did this for a number of files. Sometiimes pressing "Retry" moved the install along but eventually I just ended up spamming "Ignore" to try and see if it might work. At the end of the installation it told me it had failed and closed on me.

I have never installed any modifications and I just spent 50 bucks on this game. Return policy on PC games is non-existant because they are afraid people can go home, burn the game and bring it back to the store without any charge. So what can I do to make this game work since I can't return it?

Btw, Im using Windows Vista with 2 gigs of ram, dual core processor and the latest drivers for all my hardware. But i seriously doubt its a hardware problem.

[Spurius]

Did you mix Steam and Disk versions by any chance? On their website they say you should keep those strictly separated.