Windows Registry Editor Version 5.00

;Disable Microsoft Edge Startup Boost and background running
;StartupBoostEnabled=0 prevents Edge from pre-launching at system startup
;AllowPrelaunch=0 prevents Edge from pre-launching in the background
;BackgroundModeEnabled=0 prevents Edge from running in the background after closing

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Edge]
"StartupBoostEnabled"=dword:00000000
"AllowPrelaunch"=dword:00000000
"BackgroundModeEnabled"=dword:00000000