Windows 7: Hardware Firewall Setup?

I have two pc's running in my room and i was wondering if it was possible to run the internet through one computer into my main computer and have the first computer act as a firewall which will protect the main computer from attacks but still allow access to the home network and internet.

If so has it got a specific name so i can research it further.

Any help would be greatly appriciated

Cheers

For Wi Fi connection, you can use one of your PCs as software router:
Windows 7 includes a little-known new feature called Virtual Wi-Fi, which effectively turns your PC or laptop into a software-based router. Any other Wi-Fi-enabled devices within range - a desktop, laptop, an iPod perhaps - will "see" you as a new network and, once logged on, immediately be able to share your internet connection... This will only work if your wireless adapter driver supports it, though, and not all do. Check with your adapter manufacturer and make sure you've installed the very latest drivers to give you the best chance.
Once you have driver support then the easiest approach is to get a network tool that can set up virtual Wi-Fi for you. Virtual Router is free, easy to use and should have you sharing your internet connection very quickly.
I've lost the link from the website, but I still have the one for the virtual router.
cheers

You can also try Connectify which is past the beta now.

Connectify - Turn your Windows 7 laptop into a WiFi Hotspot

Thanks guys,