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# Black desktop: Progman stuck on wrong monitor after topology change

Win11 multi-monitor race: Progman anchors to secondary monitor after connect/disconnect, leaving primary monitor showing DWM fallback color. Fix: restart explorer.exe (2-3s blip).

user/developer
black desktop progman workerw multi-monitor explorer wallpaper spotlight

## Steps

1. SYMPTOM: Primary monitor shows solid black/d...
2. ROOT CAUSE: Win11 Spotlight + multi-monitor...
3. DIAGNOSE: FindWindow('Progman') hwnd rect co...
4. FIX: Stop-Process -Name explorer -Force; Sta...
5. VERIFY: GetPixel(screen DC, 0, 0) returns wa...
6. DO NOT call SPI_SETDESKWALLPAPER before fixi...
7. OPTIONAL persistent fix: Set-ItemProperty HK...
8. 2026-05-20 POST-MORTEM: Pass 2 of screensave...