This issue may occur if the user profile was manually deleted by using the command prompt or byusing Windows File Explorer and if the “Do not logon users with ...

During an attempt to sign in, if Windows displays the Please wait for the User Profile Service message for a long time, say 5 minutes, then that post will help you ...

Nothing short of normal Windows updates have been installed recently, and I've no idea how long this problem has existed, as my standard user account along with the admin account still work just fine.