aka.ms/familyverify
The Microsoft Family verification process might have problems that could cause errors or make it work wrong. A common reason why aka.ms/familyverify fails is that Windows is out of date. If your system is old, it could cause problems when trying to verify. A few other things could also cause the aka.ms/familyverify to fail. Here are some of them:
Problems with your Microsoft Family account: Applications that need to be fixed, bad network connections, etc.