BSOD HELP! URGENT!

Ive been having the BSOD for far to long!
I need help with this asap. My business is hurting because of this!

Code:

Problem signature:
  Problem Event Name:    BlueScreen
  OS Version:    6.1.7600.2.0.0.768.3
  Locale ID:    1033

Additional information about the problem:
  BCCode:    a
  BCP1:    00000001040BE7F0
  BCP2:    0000000000000002
  BCP3:    0000000000000000
  BCP4:    FFFFF8000328C855
  OS Version:    6_1_7600
  Service Pack:    0_0
  Product:    768_1

This Keeps Happening for maybe 6 months now. You have no idea how annoying this is.

If You wind up not being able to fix i was wondering how i would go about clearing all my files. But still keeping my OS. (windows 7) I do not have the CD seeing as I don't remember getting one when i got the computer. (could be wrong.)

Im open to anything! please help!

Enable Driver Verifier and upload the new dumps which are created as this one shows no probable cause
Driver Verifier - Enable and Disable

Try this one then

Sorry i guess i didnt specify. I can't log on normally. only in safe mode because of the blue screen.

Please enable driver verifier then upload the dumps which are created, these ones show no probable cause