Are we talking about CP or DZ?Since you know the game so well, any idea why the game freezes for me as soon as I try to leave the training opening area? The "full" game never loads.
Any ways really hard to say without seeing some crash logs. Might be some outdated drivers, bad CPU, bad GPU, bad RAM or VRAM, incompatible game with some hardware you have or perhaps corrupted on the download copy of the game (usually due to RAM is about to kick the bucket) or something went FUBAR when you patched the game (usually due to CPU or RAM about to kick the bucket or somehow you were able to patch over version you shouldn't be able to, skipping some patch in the middle).
I would try first reinstalling, then another version (another dl source) install and third to ask from the creators what might be up.