Game freezes--autosave related?

[Grimmy]

I have seemingly the exact same problem; a freeze which locks up my whole PC (unable to bring up tsk manager or alt tab), but as I installed via steam I dont thing I can choose where I install the game to. If this is the fix to the problem does anyone have any idea how I fix it through Steam??

BTW..whilst this game is working I really love it! Well done! Its just a real shame I get this crash every 45 minutes or so which spoils my enjoyment.

Any patches coming to fix this?

[Grimmy]

Well I've switched anti virus software, checked core temperatures, got latest gfx drivers but I still have the same problem. Could steam be to blame for this?
I even had a complete lockup in the front end just a minute ago. I really want to play this, can anyone help me?