Sorry for my English
Windows 8.1 32-bit Professional
When I've tried to inspect certain system process thread (PID=4), the ProcessHacker hangs up on loading stack (Loading stack windows on top)
3052, , , ntoskrnl.exe!SeCreateClientSecurityFromSubjectContextEx+0x88c7, -4
This is due to the break down of APC that is entered on queue for execution the mentioned thread and this lead to latency in KeWaitForSingleObject (function KphCaptureStackBackTraceThread(), KProcessHacker\thread.c).