AutoIT - Untested as of this post vased off of a few ways to prevent window10 from resetting default apps

W10_prevent_reset_detaultAPPS.au3

#RequireAdmin
#Region ;**** Directives created by AutoIt3Wrapper_GUI ****
#AutoIt3Wrapper_Icon=
#AutoIt3Wrapper_Outfile_x64=AntiDefAppHijacker.exe
#AutoIt3Wrapper_Compression=4
#AutoIt3Wrapper_UseX64=y
#AutoIt3Wrapper_Res_Comment=attempts to prevent Windows 10 from resetting default apps for a few applications
#AutoIt3Wrapper_Res_Description=prevent default app reset
#AutoIt3Wrapper_Res_Fileversion=1.0.0.1
#AutoIt3Wrapper_Res_ProductVersion=1.0.0.1
#AutoIt3Wrapper_Res_LegalCopyright=carm01@GitHub
#AutoIt3Wrapper_Res_Language=1033
#EndRegion ;**** Directives created by AutoIt3Wrapper_GUI ****
; https://kolbi.cz/blog/2017/10/25/setuserfta-userchoice-hash-defeated-set-file-type-associations-per-user/
; https://www.winhelponline.com/blog/edge-hijack-pdf-htm-associations/
; https://appuals.com/how-to-disable-edge-pdf-viewer-in-windows-10/
; Place this as a start up script for all users and it will run silently without using hardly any resources.
; It will wait 60 seconds and if it does not detect a place holder file, then it will apply the fixes and writes a null file as a placeholder (w data that it set for default apps) to tell it that there is no need for it to run.
; If it finds the place holder file then it exists without doing anything
#include <array.au3>
#include <File.au3>
#NoTrayIcon
Global $sBase_x32 = "HKEY_CURRENT_USER\Software\Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\Repository\Packages\"
Global $browser = 'Microsoft.MicrosoftEdge_', $music = 'Microsoft.ZuneMusic_', $video = 'Microsoft.ZuneVideo_', $photos = 'Microsoft.Windows.Photos_'
Local $sCurrent, $sKey
Dim $sData[1]
Local $BulkFile = 'C:\Users\' & @UserName & '\AppData\Roaming\Microsoft\Windows\Prevent_App_hijack\placeholder'

;Sleep(60000)
Call('checkr')
Call('u')
If Not FileExists($BulkFile) Then
	_FileCreate($BulkFile)
	_FileWriteFromArray($BulkFile, $sData, 1)
EndIf
Exit

Func U()
	$iEval = 1
	While 1
		$sUninst = ""
		$sDisplay = ""
		$sCurrent = RegEnumKey($sBase_x32, $iEval)
		If @error Then ExitLoop
		$sKey = $sBase_x32 & $sCurrent
		$aArray = StringRegExp($sKey, '(?i)' & $browser, $STR_REGEXPARRAYGLOBALMATCH)
		If @error = 0 Then
			EDGE()
		EndIf
		$aArray = StringRegExp($sKey, '(?i)' & $music, $STR_REGEXPARRAYGLOBALMATCH)
		If @error = 0 Then
			music()
		EndIf
		$aArray = StringRegExp($sKey, '(?i)' & $video, $STR_REGEXPARRAYGLOBALMATCH)
		If @error = 0 Then
			Videos()
		EndIf
		$aArray = StringRegExp($sKey, '(?i)' & $photos, $STR_REGEXPARRAYGLOBALMATCH)
		If @error = 0 Then
			PHOTOS()
		EndIf
		$iEval += 1
	WEnd
EndFunc   ;==>U


Func EDGE()
	$sfullKeyEDGE = $sKey & '\MicrosoftEdge\Capabilities\FileAssociations'
	$sHTM = RegRead($sfullKeyEDGE, ".htm")
	_ArrayAdd($sData, $sHTM & ' Microsoft.MicrosoftEdge - .htm and .html files')
	RegWrite('HKEY_CURRENT_USER\SOFTWARE\Classes\' & $sHTM, 'NoOpenWith', 'REG_SZ', "")
	RegWrite('HKEY_CURRENT_USER\SOFTWARE\Classes\' & $sHTM, 'NoStaticDefaultVerb ', 'REG_SZ', "")
	$sPDF = RegRead($sfullKeyEDGE, ".pdf")
	_ArrayAdd($sData, $sPDF & ' Microsoft.MicrosoftEdge-  .pdf files')
	RegWrite('HKEY_CURRENT_USER\SOFTWARE\Classes\' & $sPDF, 'NoOpenWith', 'REG_SZ', "")
	RegWrite('HKEY_CURRENT_USER\SOFTWARE\Classes\' & $sPDF, 'NoStaticDefaultVerb ', 'REG_SZ', "")
EndFunc   ;==>EDGE

Func PHOTOS()
	$sfullKey = $sKey & '\App\Capabilities\FileAssociations'
	$sValue = RegRead($sfullKey, ".jpeg")
	_ArrayAdd($sData, $sValue & ' Microsoft.Windows.Photos - .bmp .dib .gif .heic .jfif .jpe .jpeg .jpg .jxr .png .tif .tiff .wdp .ico .thumb')
	RegWrite('HKEY_CURRENT_USER\SOFTWARE\Classes\' & $sValue, 'NoOpenWith', 'REG_SZ', "")
	RegWrite('HKEY_CURRENT_USER\SOFTWARE\Classes\' & $sValue, 'NoStaticDefaultVerb ', 'REG_SZ', "")
	$sValue = ""
	$sValue = RegRead($sfullKey, ".mp4")
	_ArrayAdd($sData, $sValue & ' Microsoft.Windows.Photos - .3g2, .3gp, .3gp2, .3gpp, .asf, .avi, .m2t, .m2ts, .m4v, .mkv, .mov, .mp4, .mp4v, .mts, .wm, .wmv')
	RegWrite('HKEY_CURRENT_USER\SOFTWARE\Classes\' & $sValue, 'NoOpenWith', 'REG_SZ', "")
	RegWrite('HKEY_CURRENT_USER\SOFTWARE\Classes\' & $sValue, 'NoStaticDefaultVerb ', 'REG_SZ', "")
	$sValue = ""
	$sfullKey = ""
EndFunc   ;==>PHOTOS

Func Videos()
	$sfullKey = $sKey & '\Microsoft.ZuneVideo\Capabilities\FileAssociations'
	$sValue = RegRead($sfullKey, ".mp4")
	_ArrayAdd($sData, $sValue & 'Microsoft.ZuneVideo -  .3g2, .3gp, .3gp2, .3gpp, .asf, .avi, .divx, .m1v, .m2ts, .m2t, .m2v, .m4v, .mkv, .mod, .mov, .mp2v, .mp4, .mp4v, .mpe, .mpeg, .mpg, .mpv2, .mts, .ogm, .ogv, .ogx, .tod, .ts, .tts, .webm, .wm, .wmv, .xvid')
	RegWrite('HKEY_CURRENT_USER\SOFTWARE\Classes\' & $sValue, 'NoOpenWith', 'REG_SZ', "")
	RegWrite('HKEY_CURRENT_USER\SOFTWARE\Classes\' & $sValue, 'NoStaticDefaultVerb ', 'REG_SZ', "")
	$sValue = ""
	$sfullKey = ""
EndFunc   ;==>Videos

Func music()
	$sfullKey = $sKey & '\Microsoft.ZuneMusic\Capabilities\FileAssociations'
	$sValue = RegRead($sfullKey, ".aac")
	_ArrayAdd($sData, $sValue & ' Microsoft.ZuneMusic - .aac, .ac3, .adt, .adts, .amr, .ec3, .flac, .m4a, .m4r, .mka, .mp3, .mpa, .wav, .wma, .m3u, .wpl, .zpl')
	RegWrite('HKEY_CURRENT_USER\SOFTWARE\Classes\' & $sValue, 'NoOpenWith', 'REG_SZ', "")
	RegWrite('HKEY_CURRENT_USER\SOFTWARE\Classes\' & $sValue, 'NoStaticDefaultVerb ', 'REG_SZ', "")
	$sValue = ""
	$sfullKey = ""
EndFunc   ;==>music

Func checkr()
	If FileExists($BulkFile) Then
		Exit
	ElseIf Not FileExists($BulkFile) Then
		Return
	EndIf
EndFunc   ;==>checkr

Win10_prevent_Default_apps_reset.cmd

:: https://www.winhelponline.com/blog/edge-hijack-pdf-htm-associations/
:: https://appuals.com/how-to-disable-edge-pdf-viewer-in-windows-10/

:: prevent Windows10 from hijacking/resetting default browser to EDGE
REG ADD "HKCU\SOFTWARE\Classes\AppX4hxtad77fbk3jkkeerkrm0ze94wjf3s9" /v "NoOpenWith" /d "" /t REG_SZ /f
REG ADD "HKCU\SOFTWARE\Classes\AppX4hxtad77fbk3jkkeerkrm0ze94wjf3s9" /v "NoStaticDefaultVerb" /d "" /t REG_SZ /f

:: prevent Windows10 from hijacking/resetting default pdf to EDGE
REG ADD "HKCU\SOFTWARE\Classes\AppXd4nrz8ff68srnhf9t5a8sbjyar1cr723" /v "NoOpenWith" /d "" /t REG_SZ /f
REG ADD "HKCU\SOFTWARE\Classes\AppXd4nrz8ff68srnhf9t5a8sbjyar1cr723" /v "NoStaticDefaultVerb" /d "" /t REG_SZ /f

:: prevent Windows10 from hijacking/resetting default PhotApp to Microsoft.Windows.Photos - jpg, png, jpeg files , etc
REG ADD "HKCU\SOFTWARE\Classes\AppX43hnxtbyyps62jhe9sqpdzxn1790zetc" /v "NoOpenWith" /d "" /t REG_SZ /f
REG ADD "HKCU\SOFTWARE\Classes\AppX43hnxtbyyps62jhe9sqpdzxn1790zetc" /v "NoStaticDefaultVerb" /d "" /t REG_SZ /f
:: prevent Windows10 from hijacking/resetting default PhotApp to Microsoft.Windows.Photos - mp4 files etc
REG ADD "HKCU\SOFTWARE\Classes\AppXk0g4vb8gvt7b93tg50ybcy892pge6jmt" /v "NoOpenWith" /d "" /t REG_SZ /f
REG ADD "HKCU\SOFTWARE\Classes\AppXk0g4vb8gvt7b93tg50ybcy892pge6jmt" /v "NoStaticDefaultVerb" /d "" /t REG_SZ /f

:: prevent Windows10 from hijacking/resetting default music to Microsoft.ZuneMusic
REG ADD "HKCU\SOFTWARE\Classes\AppXqj98qxeaynz6dv4459ayz6bnqxbyaqcs" /v "NoOpenWith" /d "" /t REG_SZ /f
REG ADD "HKCU\SOFTWARE\Classes\AppXqj98qxeaynz6dv4459ayz6bnqxbyaqcs" /v "NoStaticDefaultVerb" /d "" /t REG_SZ /f

:: prevent Windows10 from hijacking/resetting default music to Microsoft.ZuneVideo
REG ADD "HKCU\SOFTWARE\Classes\AppX6eg8h5sxqq90pv53845wmnbewywdqq5h" /v "NoOpenWith" /d "" /t REG_SZ /f