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Вот что показала прога "WhoCrashed"
Crash Dump Analysis
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Crash dumps are enabled on your computer.
Crash dump directories:
C:\Windows
C:\Windows\Minidump
On Fri 06.09.2019 23:44:17 your computer crashed or a problem was reported
crash dump file: C:\Windows\Minidump\090619-29546-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x1B3F50)
Bugcheck code: 0xEF (0xFFFFA485E7672240, 0x0, 0x0, 0x0)
Error: CRITICAL_PROCESS_DIED
file path: C:\Windows\system32\ntoskrnl.exe
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: NT Kernel & System
Bug check description: This indicates that a critical system process died.
There is a possibility this problem was caused by a virus or other malware.
The crash took place in the Windows kernel. Possibly this problem is caused by another driver that cannot be identified at this time.
On Fri 06.09.2019 23:44:17 your computer crashed or a problem was reported
crash dump file: C:\Windows\MEMORY.DMP
This was probably caused by the following module: ntdll.sys (ntdll+0x6AA8)
Bugcheck code: 0xEF (0xFFFFA485E7672240, 0x0, 0x0, 0x0)
Error: CRITICAL_PROCESS_DIED
Bug check description: This indicates that a critical system process died.
There is a possibility this problem was caused by a virus or other malware.
A third party driver was identified as the probable root cause of this system error. It is suggested you look for an update for the following driver: ntdll.sys.
Google query: ntdll.sys CRITICAL_PROCESS_DIED
On Fri 06.09.2019 23:41:16 your computer crashed or a problem was reported
crash dump file: C:\Windows\Minidump\090619-32984-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x1B3F50)
Bugcheck code: 0xEF (0xFFFF860FDDBD5240, 0x0, 0x0, 0x0)
Error: CRITICAL_PROCESS_DIED
file path: C:\Windows\system32\ntoskrnl.exe
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: NT Kernel & System
Bug check description: This indicates that a critical system process died.
There is a possibility this problem was caused by a virus or other malware.
The crash took place in the Windows kernel. Possibly this problem is caused by another driver that cannot be identified at this time.
On Fri 06.09.2019 23:29:14 your computer crashed or a problem was reported
crash dump file: C:\Windows\Minidump\090619-31515-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x1B3F50)
Bugcheck code: 0xEF (0xFFFFBD04EFFEC380, 0x0, 0x0, 0x0)
Error: CRITICAL_PROCESS_DIED
file path: C:\Windows\system32\ntoskrnl.exe
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: NT Kernel & System
Bug check description: This indicates that a critical system process died.
There is a possibility this problem was caused by a virus or other malware.
The crash took place in the Windows kernel. Possibly this problem is caused by another driver that cannot be identified at this time.
On Fri 06.09.2019 23:20:46 your computer crashed or a problem was reported
crash dump file: C:\Windows\Minidump\090619-23281-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x1B3F50)
Bugcheck code: 0xEF (0xFFFFCF81ABF56400, 0x0, 0x0, 0x0)
Error: CRITICAL_PROCESS_DIED
file path: C:\Windows\system32\ntoskrnl.exe
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: NT Kernel & System

Папку Minidump сюда.

У меня такая хрень была когда планка оперативы не "срабатывалась"с мамкой, сменил все норм, кстати оперативку ту в другой комп поставил и норм работает. Мемтест даже молчал