When i turned my computer on this afternoon i noticed that the Dark Messiah.exe was missing along with aload of other files! I cant run the patch because it cant find the mm.exe and i know it has completely vanished from my PC cos i cant find it anywhere on the search even with Hidden Files shown. Also in the bin folder there are no .ddl's. Im running Windows Vista 32 bit.

Your mm.exe should be in:

...:\Program Files\Steam\steamapps\<yourusername>\dark messiah might and magic single player