Recently, some users stated that after adding the Microsoft account they encounter some Windows 11 log-in issues. Microsoft has finally acknowledged the existence of this problem.
The system may prevent users from logging in; now Microsoft has finally acknowledged the existence of this problem. Microsoft said that the problem was caused by the optional update KB5016691 for Windows 11.
In this version, after adding a new Microsoft account you may be unable to log in for a short time after the first restart or exit the issue only affects newly added Microsoft accounts and only applies to first-time logins also according to Microsoft active directory domain users and azure active directory accounts are not affected by this issue at present Microsoft said that it has issued a known issue rollback to fix the problem.
At the same time, Microsoft suggests that users can restart the device to get the pushed system rollback and speed up the repair of the problem.