Get pretty far into the game then freeze, black screen and re-boot. MS error report shows serious error vid card driver (using 91.33) and/or set hardware accel back. See problem similar on other forums with no consistent solution. Tried setting nVidia SLI control to nVidia auto select and SLI application control (tried forcing alt rendering but no solution). Also using Creatives new Prey drivers. Seems to always happen at a spirit portal???