Sometimes, when you log on to Windows 10 after entering the username & password, you may see an error “The User Profile Service failed the sign-in. User profile cannot be loaded”. The login is not performed, and you are asked to lớn specify the username và password repeatedly. Among the most common mistakes with loading a user profile are:


Corrupted user profile on disk (local or roaming);Antivirus software that performs files scanning and blocking in the profile thư mục at the time of authorization. This causes an error when loading the user profile;Corrupted Windows registry file;Corrupted mặc định profile or incorrectly configured NTFS permissions.

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Let’s consider how to fix User profile cannot be loaded error in Windows 10 & log on into the system.

First of all, we recommend restarting your computer và try to log in using your account. If the reboot didn’t help, go to the following methods.


Restart your computer and try lớn log in to the new account.

Check the current permissions on the C:UsersDefault folder and make sure that it inherits permissions from its parent thư mục C:Users. You can menu the NTFS permissions with the icacls tool:

icacls c:UsersDefaultHere is the default thư mục permissions:

Open the Registy Editor (regedit.exe) and go khổng lồ the registry key HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionProfileList;In the list of the registry key tree, there will be several sections with long names starting with S-1-5. Each line corresponds to lớn the security identifier (SID) of a Windows user account & linked to a single user profile. You can danh mục the SIDs of all your local user accounts using the command:

wmic useraccount get domain,name,sid

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Troubleshooting Errors with the User Profile Service Events

The admin’s way lớn troubleshoot the user profile load errors is to analyses the error events of the User Profile Service. If you can login Window under with a different account, you need to open the event Viewer và go khổng lồ the section Application and Services Logs > Microsoft > Windows > User Profile Service > Operational. Find the most recent error event in this log.

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If you cannot login Windows, you can boot the device in the Safe Mode & copy the log tệp tin “%SystemRoot%System32WinevtLogsMicrosoft-Windows-User Profile Service%4Operational.evtx” to lớn an external USB drive for analysis on another computer.

The most common User Profile Service errors for problems loading user profile are:

Event ID 1509:Windows cannot copy file \?C:UsersDefault to lớn location \?C:Usersusername. This error may be caused by network problems or insufficient security rights.DETAIL – Access is deniedOrDetail- The file cannot be accessed by the systemSolution: kiểm tra the permissions on the specified user profile folder.Event ID 1500:Windows cannot log you on because your profile cannot be loaded. Kiểm tra thatyou are connected to lớn the network và that your network is functioning correctly.DETAIL – The system cannot find the tệp tin specified.Solution: check if the user profile folder exists on the local drive; make sure the corresponding registry key HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionProfileList points to lớn this folder. Make sure the NTUSER.DAT file is present in the user profile folder. If this tệp tin is removed or corrupted, you will have to manually copy it from another user profile on this computer or from another computer with a similar version of Windows.Event ID 1508:Windows was unable khổng lồ load the registry. This problem is often caused by insufficient memory or insufficient security rights.DETAIL – The system has attempted khổng lồ load or restore a file into the registry, but the specified file is not in a registry tệp tin format.for C:Usersmarco tuser.dat
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Solution: The NTUSER.DAT in the user profile thư mục is corrupted và needs khổng lồ be replaced (check the solution above).