To Disable Quick Assist:
1) Create Firewall Rule to block C:\Windows\System32\quickassist.exe from internet access.
2) To disable Windows Quick Assist in Group Policy, navigate to "Computer Configuration > Administrative Templates > Windows Components > Remote Desktop Services > Remote Desktop Session Host > Security" and then set the policy "Restrict Remote Assistance to authorized users" to "Enabled"
3) In Group Policy editor go to: Computer Configuration > Administrative Templates > System > Remote Assistance > Configure Solicited Remote Assistance (set to disabled)
4) Change the registry key: [HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services] "fAllowToGetHelp"=dword:00000000
For Windows Shared Experiences:
1) In Group Policy: Computer Configuration>Administrative Templates>System>Group Policy>Continue Experience On This Device (set to disabled)
2) In the registry: [HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\System]
dword: "EnableCdp"=0
Here's a link to the Microsoft Learn article about Quick Assist: https://lnkd.in/eQ5STV86
Here's a Microsoft Support post about Shared Experiences: https://lnkd.in/ehRW-guV