In productionProbeginnerBootloader discovery

Windows disappears from the boot menu

Restore a Windows boot entry without reinstalling either operating system.

Pairs with Boot, driver, and network recovery in Robotics Development Setup & Recovery. Read the concept first, then diagnose it here.

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Operator report

Ubuntu boots normally, but GRUB offers no Windows entry.

Ubuntu 24.04 setup emulator, isolated disk images, Linux recovery shell, ROS 2 Jazzy

System boundary

Trace only the relevant path.

Windows EFI loaderos-proberGRUB menu

How this lab works

You diagnose it — no command list.

Open the repair workspace and gather your own evidence in a real terminal. No diagnostic commands are handed to you — finding the fault is the exercise. Stuck? Progressive hints unlock inside the workspace.

Verification

Your repair must pass more than the visible symptom.

Windows menu entry exists
Ubuntu entry remains default
Hidden regression behavior
Root cause explanation