The security account manager service that depends on the Windows Services Pack installer update service has been disabled. The solution is to click "run" in the start menu and enter "services.msc" (without double quotation marks) in the run dialog box. Locate the security account manager service in the service window that opens, double-click the service, and change "Disabled" to "Automatic" and "Stop" to "Start". The problems encountered are generally solved. As a reminder, the cause of this problem may be caused by hacking. I found that I created a new account at startup, and then I deleted this account and disabled some services. Then I opened the web page and found some.