Bioshock purchase through Steam - Doesn't work...

I just purchased Bioshock off of Steam yesterday and I've been having issues with getting it to run at all. The message that keeps popping up says "game currently unavailable. please try again another time" Apparently this problem is somewhat widespread, but none of the solutions offered so far have worked. I've tried uninstall/reinstall a couple times, deleting clientregistry.blob in the Steam directory as well as reinstalled the microsoft visual C++ 2005 redistributable software and still nothing. If anyone has any knowledge about this then please let me know. Thanks.

 

Only thing I can think of is that it hasnt finished downloading, that seems to be the most usual problem. f its all done, see if its updating, this can cause a wait too.
I found several games do tend to take a while to load, so it may be worth waiting a few minutes and see what happens.