OK I feel silly now, but I resolved the issue.

In Windows 8, Windows Defender (previously known as Microsoft Security Essentials) is the built-in anti-virus software. It detected the steam.dll as a virus and deleted it.

The resolution was to open Defender, go to the Quarintined files and restore ...

Hi guys,

Firstly, thanks for your work on Company of Heroes.

After installing it, I can't get it to run though.

I get an error that the file 'Steam.dll' is missing. I have tried re-installing and don't have any anti-virus running. I am on Windows 8 (64).

Have you got any ideas that I can try ...