Windows 10 recommends to complete a sign in whenever to a Microsoft account when you use it for the first time. This is to sync settings and data found on your account. While attempting to log on to a Windows 10 PC, you may encounter an error message that says: The User Profile Service failed the logon. The User Profile cannot be loaded.
There are a couple of reasons why this may happen. It generally arises whenever a temporary profile is used, or if Windows cannot read user profile login details correctly. It may also be because the user profile is already corrupted. This error can be solved using these methods.
Fixed: User Profile Service Failed the Logon Windows 10
METHOD 1. USE WINDOWS 10 SAFE MODE
You may start your PC in safe mode to fix the error.
Start in Safe Mode:
Restart the PC a few times until you see the Automatic Repair
Select Advanced Options>Troubleshoot>Advanced options. Then, click Startup Settings.
Press the number 4 key to enter safe mode.
Enable Built-in Administrator
In the search bar, type command prompt and choose to run as administrator.
Type this command on the line: net user administrator /active: yes (follow the spaces exactly)
Log off the current user and log in to the administrator account enabled.
Note: After successful troubleshooting, repeat steps above and change yes to no, to disable admin account.
METHOD 2. USE WINDOWS 10 REGISTRY EDITOR
Check Status of User Profile Service
Press Win + R to open the Run dialogue box. Type in msc and click OK.
Look for User Profile Service and right-click it to start
From the dropdown menu, choose Automatic in Startup type.
Check if the login works.
Check the Registry settings
Press Windows and R simultaneously to open Run, and key in exe to open Registry Editor. Select OK.
FindHKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\ CurrentVersion\ ProfileList
On the right pane look for Default and set it to %SystemDrive%UsersDefault.
Close the window and try logging in again.
Change the Registry
Open the Registry Editor and find HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList. Look for the folder beginning with S-1-5 followed by a string of numbers.
Click the S-1-5 (SID Key) folder and double click ProfileImagePath entry to find out which user account contains an error.
Rename the S-1-D folder with .bak at the end by removing the .bak
Note: If there are multiple S-1-D folder with a long number sequence following, be careful to choose the right folder that has the .bak extension. First rename the one without .bak by adding .ba at the end and press Enter. Then, remove the .bak on the other folder (this will be the one you will use). Finally, change .ba to .bak and press Enter.
Choose the folder without .bak in the right pane and double click RefCount, type
Choose folder without .bak and double click State, and then type 0.
Restart PC and try logging in to the account again.
Delete the SID and create a new profile
If via Computer Properties, type in search bar View advanced system settings and select.
Click Advanced tab and then click Settings found in the User Profiles.
To delete the SID, open Registry Editor and look for HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList.
On the right pane, select the SID you want to remove and press Delete.
Create a new profile as prompted.
METHOD 3. CREATE A NEW USER ACCOUNT
Note: before proceeding, make sure your user profile files are backed up.
Activate a hidden admin account by opening Command and keying in net user administrator /active: yes.
Open Settings and choose Accounts.
Click Family & other people and select Add someone else to this PC
At the bottom of the window you will find I don’t have this person’s sign-in information; click on it.
Another prompt appears asking to create the account. Click Add a user without a Microsoft account.
You will get the Create account dialogue box, type in username and password and select Next.
Restart computer and sign in with the new account details.
You can choose any of the methods stated above in fixing user profile service failed log in for Windows 10. Just ensure that you have performed a system backup beforehand, since making changes such as this on your PC puts it at risk for crashes and errors, especially when executing some programs.
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