![]() Ntoskrnl.exe!FsRtlAllocateExtraCreateParameter+0x898 Ntoskrnl.exe!FsRtlAllocateExtraCreateParameter+0xa96 Ntoskrnl.exe!IoDeleteAllDependencyRelations+0x14d0 Ntoskrnl.exe!FsRtlAllocateExtraCreateParameter+0x10da Ntoskrnl.exe!FsRtlAllocateExtraCreateParameter+0x13c8 Ntoskrnl.exe!FsRtlAllocateExtraCreateParameter+0x52c4 Ntoskrnl.exe!FsRtlAllocateExtraCreateParameter+0x744e Ntoskrnl.exe!SeQuerySessionIdToken+0x1440 Ntoskrnl.exe!SeQuerySessionIdToken+0x15f9 Ntoskrnl.exe!SeQuerySessionIdToken+0x1b99 Ntoskrnl.exe!KiCheckForKernelApcDelivery+0x23 Ntoskrnl.exe!KeSetBasePriorityThread+0x4ec Ntoskrnl.exe!KeSynchronizeExecution+0x2246 I've looked at the stack for a thread and it seems it is spending most of its time in the synchronizing on one object: I've tried reinstalling all the devices to no avail for some reason rendering this window causes the unicode translation to eat all the CPU.īased on the comment received, I've installed the retail symbols for windows 8.1 and pointed process explorer (as explained in this post to it however the output looks pretty much the same. !Īny ideas how to fix this? Either I wait 20' or so or have to kill the explorer task. Looking through Sysinternals process explorer it seems the problem is caused by MultiByteToUnicodeN call (unfortunately I cannot post an image): Xperf file (thanks to for instructions) is posted on Dropbox - 24MB zip unpacked to 145MB. There's a 5-10' delay until the devices appear however the CPU keeps on spinning even after the icons are displayed for about 5-10' more minutes. I discovered recently that my Win 8.1 Update 1 (with all updates through WSUS offline) starts eating all the CPU when opening "the device and printers" window. Process Monitor – capturing file system and Registry activity.I'm facing a peculiar issue that I can't fix.There is an option (in handle context menu) to close a selected handle.There is a Find command which allows for searching a handle or DLL which can be used to identify the process(es) holding a file lock.There is a command to create a process dump (mini or full) (Process => Create Dump).In properties of a process a user can view the process's threads and threads' stack traces.(View => Lower Pane View => Handles) an option Show Lower Pane has to be switched on There is an option to display processes' handles which includes named mutants, events, sockets, files, registry keys etc.There is an option to display DLLs loaded by process (View => Lower Pane View => DLLs) an option Show Lower Pane has to be switched on.There is an option (in a process's context menu) to verify a process in VirusTotal.For example, when the pointer is placed over a svchost.exe, it will tell if it is the one performing automatic updates/secondary logon/etc., or the one providing RPC, or the one performing terminal services, and so on Disambiguates service executables which perform multiple service functions.Interactively set the priority of a process.Interactively alter a service process's access security. ![]()
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