Vertex Shaders Fail (Steam)

[gagoloth]

Nope i have the same problem i got the penumbra pack from steam three days ago and i still can play it ether the game has some weird shaders that everyones cards can handle but the game says we cant you could try to uninstall all video drivers restart download the newest video drivers install them restart then try again. but that didnt work for me even though i used a driver cleaner to delete them i tryed to do what they say to fix this problem but is dose not work but you can still try.