If you encounter “The User Profile Service service failed the sign-in. User profile cannot be loaded.” error on your Windows 10, it means your user profile has been corrupted. Furthermore, you cannot access Windows 10. But fortunately, this annoying error could be fixed easily. Go with this small guide, get rid of the error now. Here you’ll learn
the tried-and-true method for the error. Note: Before we go, you can try to reboot your Windows 10, if the error still occur, follow the fix below. Show
Fix your corrupt user profile by correcting its registry value:1) Follow this guide to boot your Windows 10 into safe mode. 2) In safe mode, open the Run box by pressing Windows logo key + R key together. Then type regedit in the box and hit Enter. If prompted by User Account Control, click YES. 3) Now Registry Editor window pops up. Go to HKEY_LOCAL_MACHINE > SOFTWARE > Microsoft > Windows NT > CurrentVersion > ProfileList 4) Check ProfileImagePath in each folder with the name has S-1-5 in ProfileList. Find out the one with your user account data.NOTICE:Case 1: If you have two folders starting with S-1-5 relates to your account and one of them ended with .bak, you have to rename the .bak folder. To do this, follow these steps: a) Right-click the folder without .bak. Then click Rename to add .ba at the end. b) Right-click the folder that is named .bak. Then click Rename to remove .bak. c) Right-click the folder that is named .ba. Then click Rename to change the .ba to .bak. Case 2: If you have only one folder starting with S-1-5 relates to your account and ends with .bak. Right-click the folder, and then click Rename to remove .bak. 5) Double-click on RefCount in the folder your account relates to and end without .bak. Then change its value into 0 and click OK. Note: If you don’t see a RefCount file, please create a new DWORD named RefCount first and set its value to 0. 6) Double-click on State in the same folder. Then change its value into 0, too. Note: If you don’t see a State file, please create a new DWORD named State first and set its value to 0. 7) Close the Registry Editor window and restart your computer to log in with your account to check if the error still occur.Most Windows errors occur after you've logged on to your computer. But, the "The User Profile Service Failed the Logon" error doesn't let you sign in at all. That is why it is a bit trickier to resolve than other Windows errors. However, you can use the following steps to diagnose and fix the issue effectively. Boot Into Safe ModeThe first thing you should do is boot Windows into Safe Mode. While you cannot log in as you normally would, you can still use your computer in safe mode. Safe mode essentially boots Windows with the bare minimum features and programs that it needs to function. To boot into Safe Mode, follow these steps: From the Sign-In Screen
If You Are Unable to Reach the Sign In Screen
Use SFC to Scan for Corrupt FilesThe most likely cause for the "User Profile Service Failed the Logon" error is a corrupt user file. This can happen due to various reasons, ranging from antivirus software scanning upon boot to a power cut while powering on your computer. Thankfully, Windows has some in-built utilities that can help you find and fix corrupt Windows files automatically. The utility is called System File Checker (SFC), and it is executed using Command Prompt:
Restore Your Computer to an Earlier StateWindows has a useful feature called System Restore that lets you roll back changes to your computer and restore it to an earlier point in time. Before proceeding further, you should know that the feature is not enabled by default, and you have to manually create restore points unless you use methods such as this one to create daily restore points. If you remember creating a restore point before the error popped up, follow these steps:
You should back up any important data or applications that they may have installed after creating the restore point. Change Registry ConfigurationAnother way to tackle the "User Profile Service Failed the Logon" error is to make some changes to the Registry. This is an advanced troubleshooting method, and it is recommended that you create a System Restore point before proceeding further. Do the following to configure the Registry properly:
What if You Don't Find a .bak File in the Registry Editor?It is unlikely, but your computer may not have created a file with the .bak extension. In this case, open Windows Explorer and go to: If you find another folder named Application Data under the one you're on, delete it, and reboot your computer. It should fix the problem. Enable the User Profile ServiceIn certain instances, the User Profile service itself may be disabled. Usually, a third-party application is the culprit. Luckily, you can enable it by running a simple command in the Command Prompt window:
Log On and Use Your ComputerIf you carefully followed the steps listed above, the "User Profile Service Failed the Logon" error should be a thing of the past. Some of these methods are used to diagnose a lot of other common Windows errors as well. So, it's useful if you keep them in mind when you experience other issues on your computer. |