Solved Windows 7 BSOD after sp1

[maxrider]

Before i install sp1 everything works fine and when i install the service pack, random BSOD occur. I can't find where things going wrong and had tried reinstalling many programs in desktop. Please help me solve this.

 

[Jonathan_King]

Please obtain a legitimate Windows version; the one you are using now is not genuine.

...Summary of the dumps:

[font=lucida console]
*** WARNING: Unable to verify timestamp for ntkrlStaforce.exe
*** ERROR: Module load completed but symbols could not be loaded for ntkrlStaforce.exe
Built by: 7600.16397.x86fre.win7_gdr_staging.090720-1852
Debug session time: Wed Mar  2 07:25:09.075 2011 (UTC - 5:00)
System Uptime: 0 days 0:02:21.667
*** WARNING: Unable to verify timestamp for ntkrlStaforce.exe
*** ERROR: Module load completed but symbols could not be loaded for ntkrlStaforce.exe
BUGCHECK_STR:  0x19_20
DEFAULT_BUCKET_ID:  VISTA_DRIVER_FAULT
SystemProductName = To Be Filled By O.E.M.
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
*** WARNING: Unable to verify timestamp for ntkrlStaforce.exe
*** ERROR: Module load completed but symbols could not be loaded for ntkrlStaforce.exe
Built by: 7600.16397.x86fre.win7_gdr_staging.090720-1852
Debug session time: Wed Mar  2 07:22:12.619 2011 (UTC - 5:00)
System Uptime: 0 days 0:04:51.226
*** WARNING: Unable to verify timestamp for ntkrlStaforce.exe
*** ERROR: Module load completed but symbols could not be loaded for ntkrlStaforce.exe
Probably caused by : win32k.sys ( win32k!FreeThreadBufferWithTag+1b )
DEFAULT_BUCKET_ID:  VISTA_DRIVER_FAULT
BUGCHECK_STR:  0x8E
SystemProductName = To Be Filled By O.E.M.
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
  
[/font]