Defender Control today: lossless undo and honest preflight #1

Defender Control is a PowerShell WPF utility to fully disable or re-enable Microsoft Defender on Windows 10 and 11. Dark theme, fully async so the interface never locks up mid-operation, detailed logging, and complete reversibility as the design goal.

Reversibility got real attention lately. Undo replay is now lossless, so re-enabling restores the exact prior state rather than an approximation of it, and background worker failures surface to you instead of dying silently where you'd never see them.

Two roadmap items are worth naming because they're about not lying to the user: a preflight that detects Defender for Endpoint and passive mode before acting, since those change what disabling even means, and a support-bundle export to make problem reports concrete.

A quick note on the neighborhood: this is the WPF sibling of DisableDefender, which leans CLI-first. Same goal, different surface, pick whichever fits your workflow. Windows edition coverage is the big unknown for both, and the thread pinned next to this one is where I collect which editions and builds people have run it against, and whether disable and re-enable both held.