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.

根据几位发生问题的用户反映，电脑在开机后会在右下角弹出User Profile Service的通知提示。你已经使用系统的默认配置文件登录。请参阅事件日志获取详细信息，或者与管理员联系。这种情况一般是由于系统配置文件毁损或者服务关闭引起的。

What is Event ID 1552? Event ID 1552 occurs when Windows cannot load a user’s profile registry hive, typically the ntuser.dat file, because another process has locked it during login. This prevents ...

This is a valid program that is required to run at startup. This program is required to run on startup in order to benefit from its functionality or so that the program will work. The following ...