JIT, or just-in-time, debugging is a developer feature that can launch a registered debugger when an application encounters an unhandled error. It is not a normal Windows 10 troubleshooting switch for everyday users. Enable it only on a development machine where you understand which debugger is registered. Windows 10 passed its standard-support end date on October 14, 2025.
Steps
Step 1: Install and open a supported debugger
For Microsoft development workflows, install a currently supported Visual Studio edition with the components needed for the application you are debugging.
Step 2: Open Visual Studio debugging options
In Visual Studio, open Tools > Options > Debugging > Just-In-Time when that page is available in your installed version.
Step 3: Select the code types you need
Enable JIT debugging only for the code categories relevant to your development work, such as Managed, Native, or Script when supported.
Step 4: Approve required permissions
Administrative permission may be needed to register or change JIT debugger settings.
Step 5: Test with your development application
Reproduce the failure in a controlled development environment and confirm that the expected debugger prompt appears.
What Happens Next
When configured correctly, eligible unhandled application errors can invoke the registered debugger instead of only presenting a normal crash experience.
Troubleshooting and Useful Details
Do not edit machine.config, Registry entries, or system debugger registrations based on old tutorials unless current debugger documentation specifically requires it for your development scenario. On a normal user’s PC, application crash logs, Event Viewer, vendor support, or application repair are usually more appropriate.
Matt Jacobs has been working as an IT consultant for small businesses since receiving his Master’s degree in 2003. While he still does some consulting work, his primary focus now is on creating technology support content for SupportYourTech.com.
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