Hello,
Thank you for posting in Q&A forum.
We suggest that you use Group Policy to disable the automatic installation of promotional applications in Windows 11. You can follow the following steps to operate:
Open the Group Policy Editor: Press Win+R, enter gpedit.msc, and press Enter.
In the Group Policy Editor, navigate to the following location: Computer Configuration>Windows Settings>Security Settings>Local Policies>Security Options.
Find and double-click the setting called "User Account Control: Administrator's elevation prompt in administrator approval mode".
After opening, change the option to "Agree Prompt".
After activation, the system will not automatically install the software, and your consent is required for each installation.
Additionally, you mentioned making modifications in the registry, but in Windows 11 Pro and Home versions, some registry settings may be ignored. Therefore, the most reliable method is to use group strategy to control the automatic installation and promotion of applications.
Hope this answer can help you well.
Best regards,
Jill Zhou