Steam Edition of Penumbra: Overture, B.P. & Requiem - Crashing

[Killer657]

I got the actual Penumbra Overture and Black plauge DISKS and overture keeps crashing when I get past the workshop when i explode the TNT and it keeps crashing saying Blue Box Detected Game Crash i got the actual Disk black plauge works perfectly but overture just is SUCKING!