Payday The Heist and Nvidia....

Verify your game files first. If that doesnt work, reinstall physx and directx. Try running PD as admin afterwards.

Try deleting the installscript.vdf file in Payday's install directory, then verify again.

Try X'ing out of the little installation box that steam pops up and then clicking play right away again. Sometimes this will skip installing useless stuff. I've only tried it to skip installing DX for the nth time.