What does it mean when the user profile Service failed the sign in?
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When Windows cannot load your user profile, you'll be logged in with a temporary profile. But if you see The User Profile Service service failed the sign-in. User profile cannot be loaded error after entering your credentials, it essentially means that Windows could not even log you in with a temporary profile. In this post, you will learn the causes of this profile load error and how to fix it. Show
Surender Kumar has more than twelve years of experience in server and network administration. His fields of interest are Windows Servers, Active Directory, PowerShell, web servers, networking, Linux, virtualization, and penetration testing. He loves writing for his blog. The User Profile Service service failed the sign in. User profile cannot be loaded Why the user profile cannot be loadedThe error could be caused by the following reasons:
A bad Windows update, OS partition resizing, or a system restore could lead to the aforementioned situations. As you can see, this error usually occurs when there is a problem with the default profile. The default profile acts like a template for all new users created on the system. The default profile problems only affect the new user accounts; users who already have their profile directory created inside C:\Users are not affected by this error. Permissions for the default profileOn a perfectly healthy Windows system, the default profile directory has Read and Execute permissions for BUILTIN\Users and Everyone. You can check the default permissions using the following PowerShell command: (Get-Acl "C:\Users\Default").Access | Format-Table -Auto Checking the ACL of the default profile directory using PowerShell When a new user logs in for the first time, these permissions allow the creation of the profile directory using the default profile template. Without sufficient permissions, Windows will log event ID 1509 in the Application log with the following message: Windows cannot copy file C:\Users\Default\NTUSER.DAT to location C:\Users\Username\NTUSER.DAT. This error may be caused by network problems or insufficient security rights. DETAIL - Access is denied. Windows cannot copy the NTUSER.DAT file from the default profile to the new user profile. This error may be caused by network problems or insufficient security rights. Nonexistent NTUSER.DAT fileWhen permissions are correct but the NTUSER.DAT file doesn't exist inside the default directory, the user profile service will log event ID 1500 with the following message: Windows cannot log you on because your profile cannot be loaded. Check that you are connected to the network, and that your network is functioning correctly. DETAIL - The system cannot find the file specified. Windows cannot log you on because your profile cannot be loaded. Check that you are connected to the network and that your network is functioning correctly Corrupted NTUSER.DAT fileWhen the NTUSER.DAT file inside the default profile is corrupt, you will see event ID 1508 with the following message: Windows was unable to load the registry. This problem is often caused by insufficient memory or insufficient security rights. DETAIL - The system has attempted to load or restore a file into the registry, but the specified file is not in a registry file format for C:\Users\Username\ntuser.dat The system has attempted to load or restore a file into the registry but the specified file is not in a registry file format for ntuser.dat When such events are logged, you will see a User Profile Service failed the sign-in. User profile cannot be loaded on the login screen. Now that you understand why this error occurs, let's discuss how to fix it. Fixing the default user profileTry restarting your computer before attempting further repairs, because problems sometimes go away with a simple restart. If the error persists, try the following:
Running an in-place upgradeIf the above steps didn't solve your problem with the default user profile, you can run an in-place upgrade to rebuild a new default profile for yourself. Doing so will not affect your files and apps, but to be on the safe side, I recommend backing up your data before you proceed. You might also want to temporarily disable your antivirus program to avoid any interference during the upgrade process. To run the in-place upgrade, follow these steps:
You can now log in with a new user without any errors. That's it; you successfully resolved the User Profile Service failed the sign-in. User profiles cannot be loaded error. Don't forget to disable the built-in administrator account if you enabled it.
How to fix the user profile service service failed to sign in?Reset Windows PC to Fix User Profile Service Failed Error. Open PC settings under Updates and security, and click on Recovery. Another way is to force kill your system a few times, and it will boot in safe mode automatically. Select Reset this PC.
What does it mean when the user profile service failed logon?The User Profile Service failed the logon. User profile cannot be loaded. This typically happens when the default profile, stored in C:\Users\Default , has incorrect permissions or is corrupt in some way.
What is the user profile service?The User Profile service stores information about users in a central location. It enables My Sites, social computing features such as social tagging and newsfeeds, and creating and distributing profiles across multiple sites and farms. It is also required by most SharePoint hybrid scenarios.
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