BSOD while playing games

Please update this driver first: ASACPI.sys Sun Mar 27 22:30:36 2005
It's the Asus ATK0110 ACPI Utility available from the Asus Support website

Update your video drivers if you haven't already done that.
Then, update your networking drivers (as there's networking involvement in the dump files).

Summary of the BSOD's:

Code:

Built by: 7600.16385.amd64fre.win7_rtm.090713-1255
Debug session time: Mon Dec 28 19:23:37.654 2009 (GMT-5)
System Uptime: 0 days 0:00:13.324
BugCheck 50, {fffff8a001e90008, 0, fffff8000338c97c, 0}
Probably caused by : ntkrnlmp.exe ( nt!SeCaptureSecurityDescriptor+13a )
DEFAULT_BUCKET_ID:  VISTA_DRIVER_FAULT
PROCESS_NAME:  System
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Built by: 7600.16385.amd64fre.win7_rtm.090713-1255
Debug session time: Mon Jan  4 10:55:36.325 2010 (GMT-5)
System Uptime: 0 days 1:34:52.995
BugCheck 50, {fffff88002e65000, 1, fffff8800febec72, 0}
*** WARNING: Unable to verify timestamp for nvlddmkm.sys
*** ERROR: Module load completed but symbols could not be loaded for nvlddmkm.sys
Probably caused by : nvlddmkm.sys ( nvlddmkm+73c72 )
DEFAULT_BUCKET_ID:  VISTA_DRIVER_FAULT
PROCESS_NAME:  csrss.exe
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Built by: 7600.16385.amd64fre.win7_rtm.090713-1255
Debug session time: Mon Jan  4 10:57:34.049 2010 (GMT-5)
System Uptime: 0 days 0:00:29.719
BugCheck A, {8, 2, 1, fffff800030881d3}
Probably caused by : tcpip.sys ( tcpip!IppRestructureHashTableUnderLock+39 )
DEFAULT_BUCKET_ID:  VISTA_DRIVER_FAULT
PROCESS_NAME:  System
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Built by: 7600.16385.amd64fre.win7_rtm.090713-1255
Debug session time: Mon Jan  4 11:12:00.782 2010 (GMT-5)
System Uptime: 0 days 0:00:10.826
BugCheck 50, {fffff8a004a40000, 0, fffff800030b8cf4, 0}
Probably caused by : ntkrnlmp.exe ( nt! ?? ::FNODOBFM::`string'+42907 )
DEFAULT_BUCKET_ID:  VISTA_DRIVER_FAULT
PROCESS_NAME:  System