My PC meets the recommended requirements for Thief and I have the latest patch, latest drivers etc, yet I still encounter some bugs that makes the game unplayable.

When I start the game's first mission, loading freezes on the end of the loading. I can hear some ambient sounds, but nothing changes.
When I try the benchmark, it gets stuck a second after loading - I can see a frozen picture and that's it.
When I try challenges - loading time is long, but it doesn't freeze and game seems to run smoothly.

So... How to solve this problem ?