Windows 7: BSODs, need helping identifying cause - dumps included

On Sat 13/08/2011 12:59:55 GMT your computer crashed
crash dump file: C:\Windows\Minidump\081311-21543-01.dmp
This was probably caused by the following module: dxgmms1.sys (dxgmms1+0x1CE31)
Bugcheck code: 0x3B (0xC0000005, 0xFFFFF88005312E31, 0xFFFFF88008C6C080, 0x0)
Error: SYSTEM_SERVICE_EXCEPTION
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 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 which cannot be identified at this time.


On Sat 13/08/2011 12:59:55 GMT your computer crashed
crash dump file: C:\Windows\memory.dmp
This was probably caused by the following module: dxgmms1.sys (dxgmms1!VidMmInterface+0xB571)
Bugcheck code: 0x3B (0xC0000005, 0xFFFFF88005312E31, 0xFFFFF88008C6C080, 0x0)
Error: SYSTEM_SERVICE_EXCEPTION
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 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 which cannot be identified at this time.




On Fri 12/08/2011 13:38:16 GMT your computer crashed
crash dump file: C:\Windows\Minidump\081211-23150-01.dmp
This was probably caused by the following module: ntfs.sys (Ntfs+0x5A88)
Bugcheck code: 0x24 (0x1904FB, 0xFFFFF88003143268, 0xFFFFF88003142AC0, 0x28160)
Error: NTFS_FILE_SYSTEM
file path: C:\Windows\system32\drivers\ntfs.sys
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: NT File System Driver
Bug check description: This indicates a problem occurred in the NTFS file system.
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 which cannot be identified at this time.


On Thu 11/08/2011 12:11:17 GMT your computer crashed
crash dump file: C:\Windows\Minidump\081111-25428-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x7FD00)
Bugcheck code: 0xC5 (0xFFFFF8A001961000, 0x0, 0x1, 0xFFFFF80002C13406)
Error: DRIVER_CORRUPTED_EXPOOL
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 the system attempted to access invalid 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. 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 which cannot be identified at this time.

Another BSOD this morning, bump

Thank you for the reply! I have followed your steps to the best of my knowledge, pc has booted up fine, but the BSOD's came and went. Is there anything i should do to see if the issue remains or continue with normal usage and report back if i suffer another blue screen?

Sorry, what i meant was that they didn't happen every time i booted up, was usually once every couple of days or so