Solution: DRIVER_IRQL_NOT_LESS_OR_EQUAL (btfilter.sys)

Here is the solution for those who get to run into this annoying restart loop, where you constantly get the BSOD DRIVER_IRQL_NOT_LESS_OR_EQUAL (btfilter.sys) and sometime get a System_Service_Exception.

This error, as you might have inferenced it is caused by your Bluetooth driver, corruption of the driver can be from several causes such as:
  • Installation of a buggy driver
  • Fiddling with the Bluetooth driver too frequently (esp when trying to get Bluetooth controllers to work using some unofficial methods)
  • Power failure or abrupt interruption when updating the BT driver etc
The solution to this fault is very simple, find a way to make it to Safe mode. 
  • Boot into safe mode
    • Windows 10 and 8 users: 
      • When system is starting hold down shift key, and select "See Advanced Repair Options".
      • Select "Troubleshoot" 
      • Select "Advanced Options".
      • Select "Startup Settings".
      • Follow the on-screen prompts
    • Other Windows (7/Vista/ etc)
      • When system is booting repeatedly tap F8 to bring up the menu
      • select "Safe Mode"
  • Uninstall the Bluetooth Driver:
    • right click


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