Steam help

please someone help 

i just downloaded my steam account with borderlands 1&2 onto a new computer and borderlands 2 i used my disk and it worked perfectly and life was good i used wifi to download borderlands 1 and it refuses to even go into the game menu i have uninstalled the whole thing and put it back on and it is giving me the same problem 

i just bought a new game on steam and it gave me the same error code  but it ran just fine

im on an asus q500a laptop downgraded to win7 pro i need someone smarter than me to point out whatever stupid mistake i made that is happend becouse im iching to get back into bl1 soon

bump 

i just reinstalled steam and both borderlands one and two and only borderlands one is refuseing to play, any ideas?

On each game, right click, go to properties, local files, and click verify integrity of game cache.

That's the usual fix. Let us know if it worked, bro. =U

i did that and it gave me this "physcudart_20.dll "  is missing still then it gives me a page of eror codes saying something about binarys 

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