BSOD - rada

Zdravím, začalo se mi občas objevovat BSOD, zde Vám zkopíruji obsah souboru 101911-10857-01.dmp. Předem děkuji za rady

Symbol search path is: D:\Symbols
Executable search path is:
Unable to load image \SystemRoot\system32\ntoskrnl.exe, Win32 error 0n2
*** WARNING: Unable to verify timestamp for ntoskrnl.exe
*** ERROR: Module load completed but symbols could not be loaded for ntoskrnl.exe
Windows 7 Kernel Version 7600 MP (4 procs) Free x64
Product: WinNt, suite: TerminalServer SingleUserTS
Built by: 7600.16385.amd64fre.win7_rtm.090713-1255
Machine Name:
Kernel base = 0xfffff800`03466000 PsLoadedModuleList = 0xfffff800`036a3e50
Debug session time: Wed Oct 19 12:06:22.301 2011 (UTC + 2:00)
System Uptime: 0 days 0:57:42.018
Unable to load image \SystemRoot\system32\ntoskrnl.exe, Win32 error 0n2
*** WARNING: Unable to verify timestamp for ntoskrnl.exe
*** ERROR: Module load completed but symbols could not be loaded for ntoskrnl.exe
Loading Kernel Symbols
.................................................. .............
.................................................. ..............
......................
Loading User Symbols
Loading unloaded module list
......
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* *
* Bugcheck Analysis *
* *
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Use !analyze -v to get detailed debugging information.

BugCheck A, {fffff87feefd5020, 2, 0, fffff800034deeb4}

***** Kernel symbols are WRONG. Please fix symbols to do analysis.

************************************************** ***********************
*** ***
*** ***
*** Your debugger is not using the correct symbols ***
*** ***
*** In order for this command to work properly, your symbol path ***
*** must point to .pdb files that have full type information. ***
*** ***
*** Certain .pdb files (such as the public OS symbols) do not ***
*** contain the required information. Contact the group that ***
*** provided you with these symbols if you need this command to ***
*** work. ***
*** ***
*** Type referenced: nt!_KPRCB ***
*** ***
************************************************** ***********************
************************************************** ***********************
*** ***
*** ***
*** Your debugger is not using the correct symbols ***
*** ***
*** In order for this command to work properly, your symbol path ***
*** must point to .pdb files that have full type information. ***
*** ***
*** Certain .pdb files (such as the public OS symbols) do not ***
*** contain the required information. Contact the group that ***
*** provided you with these symbols if you need this command to ***
*** work. ***
*** ***
*** Type referenced: nt!_KPRCB ***
*** ***
************************************************** ***********************
************************************************** ***********************
*** ***
*** ***
*** Your debugger is not using the correct symbols ***
*** ***
*** In order for this command to work properly, your symbol path ***
*** must point to .pdb files that have full type information. ***
*** ***
*** Certain .pdb files (such as the public OS symbols) do not ***
*** contain the required information. Contact the group that ***
*** provided you with these symbols if you need this command to ***
*** work. ***
*** ***
*** Type referenced: nt!_KPRCB ***
*** ***
************************************************** ***********************
Probably caused by : ntoskrnl.exe ( nt+78eb4 )