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.

The "User Profile Service Failed the Logon" error doesn't let you sign in, making it trickier to resolve. It can occur for a ...

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 ...