System Information (local) 

Computer name: L-PC
Windows version: Windows 8.1 , 6.3, build: 9600
Windows dir: C:\Windows
Hardware: X550JK, ASUSTeK COMPUTER INC.
CPU: GenuineIntel Intel(R) Core(TM) i5-4200H CPU @ 2.80GHz Intel586, level: 6
4 logical processors, active mask: 15
RAM: 4172308480 bytes total

Crash Dump Analysis 

Crash dump directory: C:\Windows\Minidump

Crash dumps are enabled on your computer.

On Sun 12/03/2017 20:42:09 your computer crashed
crash dump file: C:\Windows\Minidump\031217-35015-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x153FA0) 
Bugcheck code: 0x133 (0x1, 0x1E00, 0x0, 0x0)
Error: DPC_WATCHDOG_VIOLATION
file path: C:\Windows\system32\ntoskrnl.exe
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: NT Kernel & System
Bug check description: The DPC watchdog detected a prolonged run time at an IRQL of DISPATCH_LEVEL or above.
This appears to be a typical software driver bug and is not likely to be caused by a hardware problem. This problem might also be caused because of overheating (thermal issue). 
The crash took place in the Windows kernel. Possibly this problem is caused by another driver that cannot be identified at this time. 

On Sun 12/03/2017 20:42:09 your computer crashed
crash dump file: C:\Windows\memory.dmp
This was probably caused by the following module: nvlddmkm.sys (nvlddmkm+0x1A3021) 
Bugcheck code: 0x133 (0x1, 0x1E00, 0x0, 0x0)
Error: DPC_WATCHDOG_VIOLATION
file path: C:\Windows\system32\drivers\nvlddmkm.sys
product: NVIDIA Windows Kernel Mode Driver, Version 333.02 
company: NVIDIA Corporation
description: NVIDIA Windows Kernel Mode Driver, Version 333.02 
Bug check description: The DPC watchdog detected a prolonged run time at an IRQL of DISPATCH_LEVEL or above.
This appears to be a typical software driver bug and is not likely to be caused by a hardware problem. This problem might also be caused because of overheating (thermal issue). 
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: nvlddmkm.sys (NVIDIA Windows Kernel Mode Driver, Version 333.02 , NVIDIA Corporation). 
Google query: NVIDIA Corporation DPC_WATCHDOG_VIOLATION

On Sun 12/03/2017 20:22:28 your computer crashed
crash dump file: C:\Windows\Minidump\031217-30515-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x153FA0) 
Bugcheck code: 0x133 (0x1, 0x1E00, 0x0, 0x0)
Error: DPC_WATCHDOG_VIOLATION
file path: C:\Windows\system32\ntoskrnl.exe
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: NT Kernel & System
Bug check description: The DPC watchdog detected a prolonged run time at an IRQL of DISPATCH_LEVEL or above.
This appears to be a typical software driver bug and is not likely to be caused by a hardware problem. This problem might also be caused because of overheating (thermal issue). 
The crash took place in the Windows kernel. Possibly this problem is caused by another driver that cannot be identified at this time. 

On Sun 12/03/2017 20:20:37 your computer crashed
crash dump file: C:\Windows\Minidump\031217-29031-01.dmp
This was probably caused by the following module: Unknown () 
Bugcheck code: 0x0 (0x0, 0x0, 0x0, 0x0)
Error: CUSTOM_ERROR
A third party driver was identified as the probable root cause of this system error. 
Google query: CUSTOM_ERROR

On Sun 12/03/2017 14:21:01 your computer crashed
crash dump file: C:\Windows\Minidump\031217-30281-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x153FA0) 
Bugcheck code: 0x133 (0x1, 0x1E00, 0x0, 0x0)
Error: DPC_WATCHDOG_VIOLATION
file path: C:\Windows\system32\ntoskrnl.exe
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: NT Kernel & System
Bug check description: The DPC watchdog detected a prolonged run time at an IRQL of DISPATCH_LEVEL or above.
This appears to be a typical software driver bug and is not likely to be caused by a hardware problem. This problem might also be caused because of overheating (thermal issue). 
The crash took place in the Windows kernel. Possibly this problem is caused by another driver that cannot be identified at this time. 

Conclusion 

6 crash dumps have been found and analyzed. Only 5 are included in this report. A third party driver has been identified to be causing system crashes on your computer. It is strongly suggested that you check for updates for these drivers on their company websites. Click on the links below to search with Google for updates for these drivers: 

nvlddmkm.sys (NVIDIA Windows Kernel Mode Driver, Version 333.02 , NVIDIA Corporation)

If no updates for these drivers are available, try searching with Google on the names of these drivers in combination with the errors that have been reported for these drivers. Include the brand and model name of your computer as well in the query. This often yields interesting results from discussions on the web by users who have been experiencing similar problems.

Read the topic general suggestions for troubleshooting system crashes for more information. 

Note that it's not always possible to state with certainty whether a reported driver is responsible for crashing your system or that the root cause is in another module. Nonetheless it's suggested you look for updates for the products that these drivers belong to and regularly visit Windows update or enable automatic updates for Windows. In case a piece of malfunctioning hardware is causing trouble, a search with Google on the bug check errors together with the model name and brand of your computer may help you investigate this further.