BSOD: PAGE_FAULT_IN_NONPAGED_AREA w7 x64

Kanske 10:e gånger jag får detta meddelande på en måand, vad tar jag mig till?
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Dump File : 050813-17628-01.dmp
Crash Time : 2013-05-08 18:50:20
Bug Check String : PAGE_FAULT_IN_NONPAGED_AREA
Bug Check Code : 0x00000050
Parameter 1 : fffff877`12c90374
Parameter 2 : 00000000`00000000
Parameter 3 : fffff880`0654fcf7
Parameter 4 : 00000000`00000005
Caused By Driver : discache.sys
Caused By Address : discache.sys+306f750
File Description :
Product Name :
Company :
File Version :
Processor : x64
Crash Address : ntoskrnl.exe+75c00
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\050813-17628-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7601
Dump File Size : 291 701