I've installed Beoplayer on my laptop with W7.
I had some difficulties to locate the Beomedia. It didn't connect.
But after renaming your networklocation from "Home" (that's the type of network W7 asks you) to "Company".
Make sure that your workgroup names on both the Beomedia and your computer are the same.
Only then after installing the beoplayer(or beoport) software, it will find the Beomedia.