Win7 Pro 64bit.
Some maps occasional AH unrecoverable errors. Some maps a video and audio hang and black screen for 20-30 seconds then a reset like when you go to the desktop then bring the game back up with the audio returning instantly while the video rendering rebuilds the environment. I'm using an NVIDIA GTX275. When I get the video reset, after I log off the game for the night Win7 will give me a video error warning that my NVIDIA card had stopped working then was recovered.
Operating System: Windows 7 Professional 64-bit (6.1, Build 7600) (7600.win7_gdr.100618-1621)
           Language: English (Regional Setting: English)
System Manufacturer: System manufacturer
       System Model: System Product Name
               BIOS: BIOS Date: 02/23/09 21:14:18 Ver: 08.00.14
          Processor: Intel(R) Core(TM)2 Duo CPU     E8500  @ 3.16GHz (2 CPUs), ~3.2GHz
             Memory: 8192MB RAM
Available OS Memory: 8192MB RAM
          Page File: 1442MB used, 14937MB available
        Windows Dir: C:\Windows
    DirectX Version: DirectX 11
DX Setup Parameters: Not found
   User DPI Setting: Using System DPI
 System DPI Setting: 96 DPI (100 percent)
    DWM DPI Scaling: Disabled
     DxDiag Version: 6.01.7600.16385 64bit Unicode
Card name: NVIDIA GeForce GTX 275
       Manufacturer: NVIDIA
          Chip type: GeForce GTX 275
           DAC type: Integrated RAMDAC
         Device Key: Enum\PCI\VEN_10DE&DEV_05E6&SUBSYS_0E0619F1&REV_A1
     Display Memory: 4069 MB
   Dedicated Memory: 869 MB
      Shared Memory: 3199 MB
       Current Mode: 1680 x 1050 (32 bit) (60Hz)
       Monitor Name: LG L227W (Digital)
      Monitor Model: L227W
         Monitor Id: GSM566F
        Native Mode: 1680 x 1050(p) (59.883Hz)
        Output Type: DVI
        Driver Name: nvd3dumx.dll,nvwgf2umx.dll,nvwgf2umx.dll,nvd3dum,nvwgf2um,nvwgf2um
Driver File Version: 8.17.0012.5896 (English)
     Driver Version: 8.17.12.5896
        DDI Version: 10
       Driver Model: WDDM 1.1
  Driver Attributes: Final Retail
   Driver Date/Size: 7/9/2010 15:38:00, 12471400 bytes
        WHQL Logo'd: Yes
    WHQL Date Stamp: 
  Device Identifier: {D7B71E3E-46A6-11CF-496D-0A2E1FC2C535}
          Vendor ID: 0x10DE
          Device ID: 0x05E6
          SubSys ID: 0x0E0619F1
        Revision ID: 0x00A1
 Driver Strong Name: oem4.inf:NVIDIA_SetA_Devices.NTamd64.6 .1:Section003:8.17.12.5896:pci\ven_10de&dev_05e6
     Rank Of Driver: 00E62001
-------------
Sound Devices
-------------
            Description: Speakers (Creative SB X-Fi)
 Default Sound Playback: Yes
 Default Voice Playback: Yes
            Hardware ID: PCI\VEN_1102&DEV_0005&SUBSYS_00311102&REV_00
        Manufacturer ID: 1
             Product ID: 100
                   Type: WDM
            Driver Name: ctaud2k.sys
         Driver Version: 6.00.0001.1375 (English)
      Driver Attributes: Final Retail
            WHQL Logo'd: Yes
          Date and Size: 5/5/2010 21:30:10, 684376 bytes
            Other Files: 
        Driver Provider: Creative
         HW Accel Level: Basic
              Cap Flags: 0xF1F
    Min/Max Sample Rate: 100, 200000
Static/Strm HW Mix Bufs: 1, 0
 Static/Strm HW 3D Bufs: 0, 0
              HW Memory: 0
       Voice Management: No
 EAX(tm) 2.0 Listen/Src: No, No
   I3DL2(tm) Listen/Src: No, No
Sensaura(tm) ZoomFX(tm): No
---------------------
Sound Capture Devices
---------------------
            Description: Microphone (Creative SB X-Fi)
  Default Sound Capture: Yes
  Default Voice Capture: Yes
            Driver Name: ctaud2k.sys
         Driver Version: 6.00.0001.1375 (English)
      Driver Attributes: Final Retail
          Date and Size: 5/5/2010 21:30:10, 684376 bytes
              Cap Flags: 0x1
           Format Flags: 0xFFFFF