Software⏱️ 4 min read📅 2026-06-11

How to Fix Error 1501 Error – User Profile Service (Error 1501) Cannot create temporary directory

Windows User Profile Service Error 1501: Unable to create temporary directory.

Quick Answer: Check Event Viewer logs for more information and try enabling diagnostic logs on the User Profile Service.

The User Profile Service (EPS) error 1501 is a frustrating issue that occurs when Windows fails to create a temporary profile directory. This problem affects users who are logging in for the first time, and can lead to a 'User Profile Service Failed' error message. The EPS is responsible for creating a backup of the user's profile data, and if this process fails, it can cause issues with the login process.

This error is particularly frustrating because it can be intermittent, requiring multiple logins and restarts to resolve. In this guide, we will walk through the steps to troubleshoot and fix this issue, providing a detailed approach to resolving the User Profile Service error 1501.

🔍 Why This Happens

  • The primary cause of EPS error 1501 is insufficient security rights, which prevents Windows from creating the temporary profile directory. This can occur when the user's profile directory or ProgramData directories are set to a location that does not have the necessary permissions.
  • An alternative cause of this issue is a corrupted or incomplete registry entry in the HKEY_LOCAL_MACHINE/software egistry section, which can prevent the EPS from functioning correctly.

🛠️ Step-by-Step Verified Fixes

Method 1: Checking and fixing security rights

  1. Step 1: Step 1: Check the security settings for the user's profile directory and ProgramData directories. Ensure that the 'Read & Execute' and 'Write' permissions are set to the correct users, such as the Administrators group.
  2. Step 2: Step 2: Verify that the external USB drive where the profile directories were relocated has the necessary permissions set. If using a third-party storage solution, ensure it is properly configured and has the required security settings.
  3. Step 3: Step 3: Set the 'Create Subdirectories' permission to 'Read & Execute' for all users on the target directory. This will allow Windows to create subdirectories as needed during the login process.

Method 2: Checking and fixing registry entries

  1. Step 1: Step 1: Open the Registry Editor (Regedit.exe) and navigate to HKEY_LOCAL_MACHINE/software egistry. Look for any corrupted or incomplete entries related to the EPS, such as a missing or invalid ProfileList key.
  2. Step 2: Step 2: If you find a corrupted registry entry, delete it and restart your computer. Then, verify that the EPS is functioning correctly by attempting to login with an affected user.

✨ Wrapping Up

To resolve the User Profile Service error 1501, first check and fix any security rights issues related to the user's profile directory and ProgramData directories. If this does not resolve the issue, try checking and fixing any corrupted registry entries in the HKEY_LOCAL_MACHINE egistry section. By following these steps, you should be able to identify and address the root cause of the problem, allowing you to login successfully with the affected user.

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