Hmm. I'm not really familiar with this graphics glitch so I might be wrong here. If you're using the latest drivers, it is best to try to downgrade to an older driver or do a clean install of the graphics drivers. Another option is to download the graphics drivers from your graphics card manufacturer to see if anything helps or not.
As for the game freeze, I am quite familiar with this problem. Encountered this in quite a number of games I played previously. Try updating your sound drivers to see if anything helps or not. If not, then changing the compatibility of the executable file, enable 'Force Software' mode in the audio settings or reduce the DirectX sound acceleration all the way to the minimum.
Hope it helps. 
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