Tried everything in these posts including reloading DirectX from Msoft website, renaming obscure files, Checking integrity, clearing local content and redownload, rebooting pc etc all failed.
Still had weird initial screen with buttons all over the place and back screen torn, game just disappeared when attempt to run etc. (Win 7 64 bit Steam base)
Completely removed video driver then reinstall and runs perfect now.
Assumes windows 7 - (be aware win 7 loads drivers really easily where xp and vista might need driver from your supplier or disk that came with the vid card)
Start / My computer / <right click> / manage / device manager / display adapters / Right click the video driver and select UNINSTALL
Once its complete
Computer management screen / device manager / action / scan for hardware changes