If you had taken the time to check, you would have noticed that this update history is exactly the same as anyone else with a so-called "legit" copy. Just right-click on HL2 in the steam menu and click on
View update news. Nothing wrong there.
Weird, looks like a pirated game to me!
Valve/Half-life 2/HL2/CFG pretty much gives it away.
Steam\SteamApps\Account name\half-life 2\hl2\cfg should be the correct path.
No hard feelings!
No, actually, there are no steam equivalent.
It's the "bronze" version with half-life: source and a t-shirt.
http://www.halflife2.net/page.php?p=steam_purchase
Go back to the previous room, you will find a ladder in the midddle of the room that will take you to the top of the pipes, follow them until you reach the room with the valve, from there just jump down to the valve.
Anyway, I'm going to sleep so good luck, look around a bit, you can't miss...
Go in your controls and set a key to 'bind screen shot (I think it's near the bottom) the screenshot will appear in Steam\SteamApps\YourAccount\half-life 2\hl2\screenshots
Is the first room the one with all the explosive barrels and manhacks?
edit: well I have no idea where you are :o ... if you could post a screenshot I might be able to help you.
Get on the pipes in the first room using the ladder.
Get to the second room using the pipes.
Fall until you reach a red valve, 'use' it.
You should know what to do next.