SkillR :
try to use WhoCrashed to gather more info.
On Sat 22/04/2017 16:30:15 your computer crashed
crash dump file: C:\WINDOWS\memory.dmp
This was probably caused by the following module: Unknown (0xFFFF9C86AA41AB40)
Bugcheck code: 0xC2 (0x7, 0x0, 0x0, 0xFFFF9C86AA41AB40)
Error: BAD_POOL_CALLER
Bug check description: This indicates that the current thread is making a bad pool request.
This appears to be a typical software driver bug and is not likely to be caused by a hardware problem.
A third party driver was identified as the probable root cause of this system error.
On Fri 21/04/2017 20:46:00 your computer crashed
crash dump file: C:\WINDOWS\Minidump\042117-25328-01.dmp
This was probably caused by the following module: npfs.sys (Npfs+0xC3ED)
Bugcheck code: 0x3B (0xC0000005, 0xFFFFF80806CBC3ED, 0xFFFFB700605AFC80, 0x0)
Error: SYSTEM_SERVICE_EXCEPTION
file path: C:\WINDOWS\system32\drivers\npfs.sys
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: NPFS Driver
Bug check description: This indicates that an exception happened while executing a routine that transitions from non-privileged code to privileged code.
This appears to be a typical software driver bug and is not likely to be caused by a hardware problem.
The crash took place in a standard Microsoft module. Your system configuration may be incorrect. Possibly this problem is caused by another driver on your system that cannot be identified at this time.