General

Cannot find steamapi.dll?

I came back to MS a few weeks ago and had trouble downloading/installing from the website so I was suggested to download and install from steam, and it worked. I could and hadn't had problems until the recent RED patch. After I patched and whatnot and I click play it brings up "Cannot find 'steam_api.dll'". Any solutions on how to fix this? I was reading online and it said something about in steam right clicking the game and going to properties and verify the integrity of the game cache, which I did and after it was done I tried again and I'm getting the same error.

Edit: I just did the verify the game cache thing again and like last time it said something like 30 updates failed to update and will be reacquired, and is now downloading something again. It just keeps doing this over and over.