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

Your Windows driver questions... answered.
Welcome to the OSR Developer Community!

Have you just discovered our community?
If so, welcome! You can read more about the community here including its history.

In short, this is the place to ask and answer questions about Windows system software development. The forum provides worldwide peer help with solving problems related to the design, development, and debugging of Windows drivers of all types (including WDF both KMDF, UMDF, even WDM device drivers and software-only drivers), Windows file system Minifilters, and Windows file systems. Are you having trouble figuring out how to do something in a driver you're developing? Do you have a crash in your driver that you're having trouble diagnosing? We have a forum for you!

Migrating from OSR Online? Read the FAQ About Our New Home: We recently migrated from our long-time location at OSRONLINE.COM. To help users cope with the move, we've building up an FAQ in the "Announcements and Administration" section. Check out the Community FAQ here.

Please don't hesitate to let us know about problems you encounter. Post your questions or issues in the Announcements and Administration (AKA, "A&A") section. Above all, we hope you enjoy our new home and that we all quickly settle down and become productive. Thanks for joining us!!
Before Posting...
Please check out the Community Guidelines in the Announcements and Administration Category.

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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 30 Mar 2020 OSR Seminar Space
Developing Minifilters 20 Apr 2020 LIVE ONLINE
Writing WDF Drivers 11 May 2020 LIVE ONLINE
Internals & Software Drivers 28 Sept 2020 Dulles, VA