im having win32k.sys bsod quite frequent after recent windows update (im suspecting) because there weren't any problems before this

if faulty ram is the cause, what ram should i change into?

im using dell inspiron 14r 5420 

On Sun 12/14/2014 6:28:07 PM GMT your computer crashed
crash dump file: C:\Windows\Minidump\121514-20950-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x75B80)
Bugcheck code: 0x7F (0x8, 0x80050033, 0x406F8, 0xFFFFF80002E90E3F)
Error: UNEXPECTED_KERNEL_MODE_TRAP
file path: C:\Windows\system32\ntoskrnl.exe
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: NT Kernel & System
Bug check description: This bug check indicates that the Intel CPU generated a trap and the kernel failed to catch this trap.
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 12/14/2014 6:28:07 PM GMT your computer crashed
crash dump file: C:\Windows\memory.dmp
This was probably caused by the following module: ntkrnlmp.exe (nt!KeBugCheckEx+0x0)
Bugcheck code: 0x7F (0x8, 0x80050033, 0x406F8, 0xFFFFF80002E90E3F)
Error: UNEXPECTED_KERNEL_MODE_TRAP
Bug check description: This bug check indicates that the Intel CPU generated a trap and the kernel failed to catch this trap.
The crash took place in the Windows kernel. Possibly this problem is caused by another driver that cannot be identified at this time.



On Thu 12/11/2014 2:36:45 PM GMT your computer crashed
crash dump file: C:\Windows\Minidump\121114-29172-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x75B80)
Bugcheck code: 0x50 (0xFFFFFA800F0CBFD0, 0x0, 0xFFFFF80002E7A44F, 0x2)
Error: PAGE_FAULT_IN_NONPAGED_AREA
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 invalid system memory has been referenced.
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 the Windows kernel. Possibly this problem is caused by another driver that cannot be identified at this time.



On Sun 12/7/2014 6:40:45 PM GMT your computer crashed
crash dump file: C:\Windows\Minidump\120814-15272-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x75B80)
Bugcheck code: 0x50 (0xFFFFFA801A9A1290, 0x0, 0xFFFFF80002E8A55B, 0x2)
Error: PAGE_FAULT_IN_NONPAGED_AREA
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 invalid system memory has been referenced.
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 the Windows kernel. Possibly this problem is caused by another driver that cannot be identified at this time.



On Sun 12/7/2014 3:17:16 PM GMT your computer crashed
crash dump file: C:\Windows\Minidump\120714-15818-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x75B80)
Bugcheck code: 0x1A (0x41790, 0xFFFFFA8000DFE8D0, 0xFFFF, 0x0)
Error: MEMORY_MANAGEMENT
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 severe memory management error occurred.
This might be a case of memory corruption. More often memory corruption happens because of software errors in buggy drivers, not because of faulty RAM modules.
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 12/5/2014 10:30:09 PM GMT your computer crashed
crash dump file: C:\Windows\Minidump\120614-21153-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x75B80)
Bugcheck code: 0x50 (0xFFFFFA801AC0F940, 0x0, 0xFFFFF80002EFD942, 0x2)
Error: PAGE_FAULT_IN_NONPAGED_AREA
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 invalid system memory has been referenced.
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 the Windows kernel. Possibly this problem is caused by another driver that cannot be identified at this time.



On Fri 12/5/2014 3:40:14 PM GMT your computer crashed
crash dump file: C:\Windows\Minidump\120514-37923-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x75B80)
Bugcheck code: 0x50 (0xFFFFF6B9B632B230, 0x0, 0xFFFFF80002EA88D3, 0x5)
Error: PAGE_FAULT_IN_NONPAGED_AREA
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 invalid system memory has been referenced.
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 the Windows kernel. Possibly this problem is caused by another driver that cannot be identified at this time.



On Wed 12/3/2014 9:22:00 PM GMT your computer crashed
crash dump file: C:\Windows\Minidump\120414-22526-01.dmp
This was probably caused by the following module: nvlddmkm.sys (nvlddmkm+0x106802)
Bugcheck code: 0xD1 (0x7E9FF83, 0xA, 0x1, 0xFFFFF8800F145802)
Error: DRIVER_IRQL_NOT_LESS_OR_EQUAL
file path: C:\Windows\system32\drivers\nvlddmkm.sys
product: NVIDIA Windows Kernel Mode Driver, Version 344.75
company: NVIDIA Corporation
description: NVIDIA Windows Kernel Mode Driver, Version 344.75
Bug check description: This indicates that a kernel-mode driver attempted to access pageable memory at a process IRQL that was too high.
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. It is suggested you look for an update for the following driver: nvlddmkm.sys (NVIDIA Windows Kernel Mode Driver, Version 344.75 , NVIDIA Corporation).
Google query: NVIDIA Corporation DRIVER_IRQL_NOT_LESS_OR_EQUAL



On Wed 12/3/2014 5:05:27 PM GMT your computer crashed
crash dump file: C:\Windows\Minidump\120414-21372-01.dmp
This was probably caused by the following module: dxgmms1.sys (0xFFFFF8800696619D)
Bugcheck code: 0x50 (0xFFFFFA801B24D000, 0x1, 0xFFFFF8800696619D, 0x2)
Error: PAGE_FAULT_IN_NONPAGED_AREA
file path: C:\Windows\system32\drivers\dxgmms1.sys
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: DirectX Graphics MMS
Bug check description: This indicates that invalid system memory has been referenced.
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.



On Tue 12/2/2014 9:12:14 AM GMT your computer crashed
crash dump file: C:\Windows\Minidump\120214-20482-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x75B80)
Bugcheck code: 0x50 (0xFFFFFA801A058840, 0x0, 0xFFFFF80002CE2B46, 0x2)
Error: PAGE_FAULT_IN_NONPAGED_AREA
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 invalid system memory has been referenced.
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 the Windows kernel. Possibly this problem is caused by another driver that cannot be identified at this time.

All questions for PC/Laptop automatically restarting goes here.

First step on PC restart/restart loop diagnostics is to turn off auto restart when an error occurs.

right click My Computer | Properties | Advanced | Startup and Recovery | Settings | untick Automatically Restart

http://img.photobucket.com/albums/v621/asendure/restart.jpg 

for BSOD errors please go here for self-diagnostic or post up your minidump files here. If it's not BSOD errors go here.

I run the debugger and found the culprit in the line probably caused by:. I don't know what that file is. what should I do?

Scour the internet to find out. your friend to find out what those errors in mean is:
1. http://support.microsoft.com/search/?adv=1
2. http://www.google.com
3. zip the minidump files and upload it to this thread.

Additional Reading

• Demystifying the 'Blue Screen of Death' from Microsoft Technet
  
• Windows Debuggers: Part 1: A WinDbg Tutorial from The Code Project
  
• Generate a memory dump file by using the keyboard
  
• Overview of memory dump file options
  
• Windows does not save memory dump file after a crash