Blue Screen on Win 7 64 Bit

Every few days I get a blue screen of death on my Windows 7 Enterprise computer
Here are the details

A problem has been detected and Windows has been shut down to prevent damage to your computer.

Modification of system code or a critical data structure was detected.

If this is the first time you've seen this stop error screen, restart your computer.   If this screen appears again, follow these steps:

Check to make sure any new hardware or software is properly installed.  If this is a new installation, ask your hardware or software manufacturer for any windows updates you might need.

If problems continue, disable or remove any newly installed hardware or software. Disable the bios memory to remove or disable components, restart your computer, press F8 to select Advanced Startup options, and then select Safe Mode.

 

Technical information:
*** STOP: 0x00000109 (0xA3A039089576E9B1, 0x0000000000000000, 0x4EE577A0897512CE, 0x0000000000000101

 

Collecting data for crash dump ...

Initializing desk for crash dump ...

Beginning dump of physical memory,

Dumping physical memory to disk

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This is the screen that comes up after the computer is restarted again with a title: Windows has recovered from an unexpected shutdown

 

Problem signature:
  Problem Event Name:	BlueScreen
  OS Version:	6.1.7600.2.0.0.256.27
  Locale ID:	1033

Additional information about the problem:
  BCCode:	109
  BCP1:	A3A039D8A3CB25A2
  BCP2:	B3B7465EF647F798
  BCP3:	FFFFF800030FC9B0
  BCP4:	0000000000000001
  OS Version:	6_1_7600
  Service Pack:	0_0
  Product:	256_1

Files that help describe the problem:
  C:\Windows\Minidump\032111-14149-01.dmp
  C:\Users\gerhard.IVERSA\AppData\Local\Temp\WER-50887-0.sysdata.xml

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If the online privacy statement is not available, please read our privacy statement offline:
  C:\Windows\system32\en-US\erofflps.txt

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Can anyone help me with this?