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When the WSL MSIX package is updated via the Microsoft Store, the WslInstaller service automatically upgrades the MSI package by calling MsiInstallProduct. This call was made with INSTALLUILEVEL_NONE (silent install) but without setting the REBOOT=ReallySuppress property. Per Windows Installer documentation, when a silent install encounters files in use and REBOOT is not suppressed, the system reboots automatically without any user prompt. This could cause unexpected machine restarts after a Store update when WSL binaries (e.g. wslservice.exe) were in use during the upgrade. Every deployment script in the repo already passes /norestart to msiexec (deploy-to-host.ps1, deploy-to-vm.ps1, install-latest-wsl.ps1, test-setup.ps1), but the programmatic MsiInstallProduct path used by the WslInstaller service lacked the equivalent property. This change: - Always appends REBOOT=ReallySuppress to MsiInstallProduct arguments in UpgradeViaMsi, preventing Windows Installer from ever initiating a system restart during install/upgrade. - Switches UninstallViaMsi from MsiConfigureProduct to MsiConfigureProductEx so we can pass REBOOT=ReallySuppress during uninstall as well. - Propagates ERROR_SUCCESS_REBOOT_REQUIRED (3010) to callers instead of swallowing it. User-facing paths (wsl --update, wsl --uninstall) print a reboot-needed message to stderr. The background WslInstaller service silently treats 3010 as success since it has no console. Co-authored-by: Ben Hillis <benhill@ntdev.microsoft.com> Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Welcome to the Windows Subsystem for Linux (WSL) repository
Learn more about WSL | Downloads & Release notes | Contributing to WSL
About
Windows Subsystem for Linux (WSL) is a powerful way for you to run your Linux command-line tools, utilities and applications, all unmodified and directly on Windows without the overhead of a traditional virtual machine or dual boot setup.
You can install WSL right away by running this command inside of your Windows command line:
wsl --install
You can learn more about best practices for setup, overviews of WSL and more at our WSL documentation page.
Related repositories
WSL also has related open source repositories:
- microsoft/WSL2-Linux-Kernel - The Linux kernel shipped with WSL
- microsoft/WSLg - Support for Linux GUI apps in WSL
- microsoftdocs/wsl - WSL documentation at aka.ms/wsldocs
Contributing
This project welcomes contributions of all types, including coding features / bug fixes, documentation fixes, design proposals and more.
We ask that before you start working on a contribution, please read our Contributor's Guide.
For guidance on developing for WSL, please read the developer docs for instructions on how to build WSL from source and details on its architecture.
Code of Conduct
This project has adopted the Microsoft Open Source Code of Conduct
Trademarks
This project may contain trademarks or logos for projects, products, or services. Authorized use of Microsoft trademarks or logos is subject to and must follow Microsoft’s Trademark & Brand Guidelines. Use of Microsoft trademarks or logos in modified versions of this project must not cause confusion or imply Microsoft sponsorship. Any use of third-party trademarks or logos are subject to those third-party’s policies.
Privacy and telemetry
The application logs basic diagnostic data (telemetry). For more information on privacy and what we collect, see our data and privacy documentation.
The software may collect information about you and your use of the software and send it to Microsoft. Microsoft may use this information to provide services and improve our products and services. You may turn off the telemetry as described in the repository. There are also some features in the software that may enable you and Microsoft to collect data from users of your applications. If you use these features, you must comply with applicable law, including providing appropriate notices to users of your applications together with a copy of Microsoft’s privacy statement. Our privacy statement is located at https://go.microsoft.com/fwlink/?LinkID=824704. You can learn more about data collection and use in the help documentation and our privacy statement. Your use of the software operates as your consent to these practices.