1.
Windows Sandbox is currently not a removable component, but you can check if Sandbox is Enabled in
Features.
2.
Windows Backup App is part of the
Client.CBS component; which can be removed, but is not recommended because Client.CBS is responsible for some desktop features.
You can hide its appearance in Start Menu if you disable MS Account logons. This only works if you don't use Xbox, Store, OneDrive or O365 online services.
Code:
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\MicrosoftAccount]
"DisableUserAuth"=dword:00000001
Another option is to mount the install image and replace "
\Windows\System32\IntegratedServicesRegionPolicySet.json" with a version that switches the "Backup options are restricted." default setting. This requires a fully updated W10 22H2 or W11 image to work.
Download
PowerRun, and open a CMD window with TrustedInstaller rights. Now you will have the correct permissions to replace this file.