hmm i know this thread is a little old, but i sort of have this problem and need some help...
im running vista and i want to play DM, but i dont want to go an buy it before i know whether or not it will run on
vista. so i downloaded the demo, and after it was installed, i double-clicked the shortcut and after the opening logos
and intro movie, it closes down and i get two messages, the first one is "engine error: failed to lock vertex in CMeshDX8::LockVertexBuffer"
and right after i click "ok", i get "mm.exe has stopped working" but you know that message already. it isn't my video card (8500 GT 512mb) i know because
i can run TES IV: Oblivion just fine on med-high settings. i have tried to run as administrator, and have been searching for a while on how to fix this problem.
i also tried to download and install the patches...but after i download and it's instaling, i get a message telling me that i have not installed the game yet and that i should
install the game before getting the patch(this also happened to mo when downloading the patches for TES IV Oblivion construction set, but thats another story). this
whole thing is annoying and making me sad, if i just knew i could the game(and how) on my pc i would buy the game...but im not 100% sure. i dont know if this helps,
but i have seen people who have the same vertex problem when trying to play HL2. any help would be appreciated greatly, thanks in advance and sorry for the long
post.