I'm having an awful time doing this. -.- Somethings up with Steam so I've turned to trying to install the update manually. I installed something called SKIDROW something for Update 7 to overwrite the items that need to be updated. It's all really confusing, I'm not a techy person. :3
I suggest you stop there.
Skidrow is a pirating group, and continuing on the path as you are, it may reveal or lead one to believe that you are using a pirated copy of the game.
If you do indeed have a legit game, then shut down steam and turn it back on. If there is a patch to be downloaded then it will download. If nothing downloads, then you are good. Simple as that.