Windows System Software -- Consulting, Training, Development -- Unique Expertise, Guaranteed Results


Before Posting...

Please check out the Community Guidelines in the Announcements and Administration Category.

More Info on Driver Writing and Debugging

The free OSR Learning Library has more than 50 articles on a wide variety of topics about writing and debugging device drivers and Minifilters. From introductory level to advanced. All the articles have been recently reviewed and updated, and are written using the clear and definitive style you've come to expect from OSR over the years.

Check out The OSR Learning Library at:

How can I tell if my minifilter driver is being shut down

codercoder Member Posts: 10

Is there an On_Unload event or anything I can attach to that lets me know the minifilter driver is going to be shut down so I can do some cleanup work?


  • rod_widdowsonrod_widdowson Member - All Emails Posts: 1,255
    • There are three callbacks (two pre, one post) to do with instance tear down where you should do most of the work.
    • There is MJ_SHUTDOWN for OS shutdown
    • And there is unload for driver state tear down

    You should check the fine manual (starting here )

  • codercoder Member Posts: 10
    edited August 2020

    This might be the stupidest question I have ever asked, Unload and Entry? duhhhhhhh. I figured this out.

  • codercoder Member Posts: 10

    Thanks Rod, this actually helped me.

Sign In or Register to comment.

Howdy, Stranger!

It looks like you're new here. Sign in or register to get started.

Upcoming OSR Seminars
OSR has suspended in-person seminars due to the Covid-19 outbreak. But, don't miss your training! Attend via the internet instead!
Kernel Debugging 16-20 October 2023 Live, Online
Developing Minifilters 13-17 November 2023 Live, Online
Internals & Software Drivers 4-8 Dec 2023 Live, Online
Writing WDF Drivers 10-14 July 2023 Live, Online