Steam & Portal RE-Installation?

Hey all,

I recently purchased and received a new X51 and during my setup and such I accidentally uninstalled the factory installed Steam & Portal.

I was wondering if there's an easy way of re-installing them without having to restore my system to before I uninstalled them? (or having to buy Portal lol)

Any help would be greatly appreciated.
Awesome, thanks Maelstrom.

I didn't want to just re-download it til I was sure. lol

After I downloaded it, while I was registering for an account, it told me one already existed with my email address. Apparently I'd forgotten I'd made an account YEARS ago. lol

Anyways, I opened up my old account and the Portal OEM thing popped up and it's downloading now.

Thanks again.