So i was downloading borderlands 2 off steam and it gave me the option to download something called "DirectX" or something similar. Anyway, it apparently installed it ineffectively, and I had to repair the program.
When it finished installing, I pressed play, but it didn't work. Annoying, obviously, and I think it had to do with that "DirectX" graphic effect program the game tried to install.
More aboutborderlands issues
What graphics card do you have?
gigabyte windforce gtx 670
You will need to uninstall the game and re install it because it is an issue with PhysX.