Disable Access to Contacts by Apps Requirements Windows 10 build 17063. Pros: Why use this tweak If you want to disable access to contacts by apps, follow this instruction step by step. Cons: Why do not use this tweak? Your apps will have not access to contacts. How to apply this tweak manually: Open Settings menu. Then go to Privacy. After that go to Contacts, and disable the option "Allow apps to access your contacts".