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Windows 11 26H1 always open application maximized
Windows 11 Canary 26H1 - All apps opening maximized/fullscreen randomly
I'm on the latest Windows 11 Canary 26H1 build and suddenly every application started opening maximized or fullscreen.
Examples:
- ThrottleStop
- Explorer
- Settings
- Various lightweight desktop apps
Symptoms:
- Windows no longer remembers window size/position
- Minimize/restore sometimes temporarily fixes it
- Apps reopen maximized even after resizing manually
- Happens after reboot as well
What I already tried:
- Restarted Explorer
- Deleted Explorer/DWM cache
- SFC /scannow
- DISM restorehealth
- Reset WindowMetrics registry
- Disabled Snap Layouts
- GPU driver reset/reinstall
- Cleared window position cache
- Winaero Tweaker resets
- Disabled fullscreen optimizations
No error messages appear.
Specs:
- Windows 11 28020.1921
- NVIDIA GPU 5060
- Latest drivers installed
Is this a known DWM/composition engine bug in recent Canary builds, or did anyone actually find a fix?
u/ImportantProject — 5 days ago
