I split this post out to its own thread so we could talk about the freezing issue separately.
sjefen, can you give us your system specs? When it freezes, do you get a message from Windows, or does it just become unresponsive? How long have you waited for it to "wake up"? Does this occur with basic/default scene, or does it seem related to specific scenes or settings? Any other information you can add?
- Oshyan