Fix User Profile Service Sign-In Failed on Windows 10

The Windows 10 User Profile Service sign-in error usually means Windows cannot load the files and settings for the selected user profile. Restart first, then use Safe Mode or another administrator account to protect your files and repair or replace the damaged profile.

Do not delete the affected account or its profile folder before copying accessible personal files. If a recovery option warns that it will remove files, apps, or settings, stop and confirm that you have a backup.

What does the Windows 10 User Profile Service sign-in error mean?

The User Profile Service is the Windows component that loads each account’s desktop, documents, preferences, and other profile data during sign-in. “The User Profile Service failed the sign-in” or “User profile cannot be loaded” indicates a profile-loading problem, not necessarily a problem with the password.

An incorrect-password message appears when Windows rejects the sign-in credential. A Windows 10 User Profile Service failed sign-in message can appear after Windows accepts the credential but cannot open the associated profile.

Searches such as “user profile service failed the sign in Windows 10,” “user profile service failed to sign in Windows 10,” and the duplicated wording “user profile service service failed the sign in Windows 10” generally describe this same profile-loading failure.

What should I check before fixing the User Profile Service error?

1. Restart the computer from the Power menu. Choose Restart rather than Shut down, then try signing in once more.

2. Confirm that the correct account is selected on the sign-in screen. If several names appear, select the account that normally contains the missing desktop and files.

3. Record the complete error text or take a photo of it. Note whether the message says the password is incorrect, the User Profile Service failed the sign-in, or the user profile cannot be loaded.

4. Protect important files before making account changes. If another administrator can open the affected profile folder, copy accessible documents, photos, and other personal files to separate storage. Do not move or delete the original folder yet.

How do I start Windows 10 in Safe Mode when I cannot sign in?

Windows Recovery Environment is a built-in troubleshooting screen that runs outside the normal Windows desktop. From the Windows 10 sign-in screen, use these steps:

1. Select the Power icon in the lower-right corner.

2. Hold down the Shift key and select Restart. Keep holding Shift until the recovery screen appears.

3. Select Troubleshoot, then Advanced options, then Startup Settings.

4. Select Restart. After the computer restarts, press 4 or F4 for Safe Mode. Press 5 or F5 only if network access is needed.

5. Try signing in to the affected account. If it opens, immediately back up important personal files and restart normally to test the account again.

If Startup Settings is not shown, return to Advanced options and check the available recovery choices. Avoid repeatedly forcing the computer off unless Microsoft or the device manufacturer specifically instructs you to do so.

How can another administrator account help fix the Windows 10 profile?

An existing administrator account can be used to inspect the affected account without deleting its data. Sign in to that administrator account, open File Explorer, and look under the Users folder on the Windows drive for the affected profile folder.

• Copy accessible personal folders, including Desktop, Documents, Pictures, Music, and Videos, to separate storage.

• Do not copy hidden system profile files into a replacement account, because a damaged configuration may be carried with them.

• Do not rename, erase, or replace the original profile folder while it contains the only copy of the user’s files.

If no working administrator account exists, use Windows Recovery options or contact Microsoft support. Do not use password-bypass tools or unverified commands to create access.

How do I repair or recreate a damaged Windows 10 user profile?

Use the least disruptive option first when you need to fix a User Profile Service failed sign-in on Windows 10.

1. Try Safe Mode and restart normally. A temporary startup problem may clear without changing the account.

2. From a working administrator account, install pending Windows updates and run the built-in System File Checker as an administrator using the command sfc /scannow. If Windows system files are damaged, this tool may repair them without deleting personal documents.

3. If the profile still will not load, create a new local user through Settings, Accounts, Family & other users, and add someone else to the PC. Change the new account type to Administrator only if administrative access is required.

4. Sign in to the new account once so Windows creates its profile. Then copy accessible personal files from the old profile into the matching folders in the new profile.

5. Confirm that the copied files open correctly before considering removal of the damaged account. Keep a separate backup until recovery is complete.

Avoid unverified registry edits. Incorrect profile registry changes can make other accounts unavailable or separate an account from its files.

Which Windows Recovery option should I use for a profile sign-in failure?

Open Windows Recovery Environment from the sign-in screen by holding Shift while selecting Power and Restart. Select Troubleshoot, then Advanced options, and review the available choices carefully.

• System Restore: Use a restore point created before the Windows 10 user profile sign-in error began. Personal files are normally retained, but apps, drivers, and system changes made after the restore point can be removed.

• Startup Repair: This checks problems that prevent Windows itself from starting. It may help when Windows cannot reach the sign-in screen, but it is not the main repair for one damaged user profile.

• Reset this PC — Keep my files: This reinstalls Windows and is a later option. It is designed to retain personal files, but it removes installed apps and resets settings. Back up files first whenever possible.

• Reset this PC — Remove everything: This removes personal files as well as apps and settings. Do not select it for a profile error unless the loss is understood and important files are backed up.

How do I get official Microsoft support for the User Profile Service error?

Open the company’s official website and choose the support or contact option for Windows. Sign in with the Microsoft account associated with the device if requested, but remember that the affected Windows account may instead be a local account.

Prepare the device manufacturer and model, Windows 10 edition if known, the affected account name, whether it is local or connected to a Microsoft account, and the exact error wording. Also explain whether Safe Mode works, whether another administrator account is available, and which recovery steps have already been attempted.

Microsoft support may ask about backups or recovery options before suggesting account changes. Never give a support representative your password or verification code, and use only the contact choices presented through the company’s official website.