How to Fix QuickBooks Error 15240 | Step by  Step Guide

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QuickBooks is a popular accounting software. Many businesses use it to manage their finances. However, sometimes users face errors. One common issue is QuickBooks Error 15240. This error can be frustrating. It often appears during updates or payroll updates. In this blog, we will explain what causes this error and how to fix it.

What is QuickBooks Error 15240?

QuickBooks Error 15240 is an update error. It usually occurs when there is a problem with the update process. You might see an error message that says:

  • “Error 15240: The payroll update did not complete successfully.”
  • “Error 15240: The file specified cannot be opened.”
  • “Error 15240: Internet connection error: unknown error.”

These messages indicate that QuickBooks cannot complete the update. The error might prevent you from using QuickBooks properly.

Causes of QuickBooks Error 15240

Several factors can cause Error 15240. Here are the most common reasons:

  1. Incorrect Date and Time Settings: If your computer’s date and time settings need to be corrected, QuickBooks might need help verifying the time-sensitive information.
  2. Misconfigured Internet Explorer Settings: QuickBooks uses Internet Explorer to connect to the internet. If Internet Explorer settings are incorrect, it can cause issues.
  3. Firewall or Security Software Blocking: Sometimes, firewall or security software can block QuickBooks from accessing the internet. This blockage can lead to update errors.
  4. Incorrect QuickBooks Settings: QuickBooks needs proper settings to update correctly. Incorrect settings can prevent updates.
  5. Problems with User Account Control (UAC): UAC is a Windows feature that helps prevent unauthorized changes. Sometimes, it can interfere with QuickBooks updates.
Read also:  How to fix QuickBooks Error 103 | A Detailed Guide

How to Fix QuickBooks Error 15240

Fixing QuickBooks Error 15240 involves several steps. Here is a detailed guide to help you resolve the issue:

Step 1: Check Date and Time Settings

  1. Right-click on the clock in the bottom right corner of your screen.
  2. Select “Adjust date/time.”
  3. Ensure that the date and time are correct.
  4. If they are incorrect, adjust them and click “OK.”

Step 2: Verify Internet Explorer Settings

  1. Open Internet Explorer.
  2. Click on the gear icon in the top right corner and select “Internet options.”
  3. Go to the “Advanced” tab.
  4. Scroll down to the “Security” section.
  5. Ensure that the following options are checked:
    • “Use SSL 2.0”
    • “Use SSL 3.0”
    • “Use TLS 1.0”
    • “Use TLS 1.1”
    • “Use TLS 1.2”
  6. Click “Apply” and then “OK.”

Step 3: Configure Firewall and Security Software

  1. Open your firewall or security software.
  2. Ensure that QuickBooks has permission to access the internet.
  3. Add QuickBooks as an exception if necessary.
  4. Save the changes and close the software.

Step 4: Run QuickBooks as Administrator

  1. Close QuickBooks if it is open.
  2. Right-click on the QuickBooks icon.
  3. Select “Run as administrator.”
  4. Try to update QuickBooks again.

Step 5: Check User Account Control Settings

  1. Press the “Windows” key and type “User Account Control.”
  2. Select “Change User Account Control settings.”
  3. Move the slider to “Never notify.”
  4. Click “OK.”
  5. Restart your computer and try updating QuickBooks again.
  6. Remember to change the UAC settings back to their original state after updating.
Read also:  QuickBooks Error 15215: A Complete Guide to Fixing It

Step 6: Verify QuickBooks Update Settings

  1. Open QuickBooks.
  2. Go to the “Help” menu and select “Update QuickBooks Desktop.”
  3. Click on the “Options” tab.
  4. Ensure that “Mark All” and “Save” are selected.
  5. Go to the “Update Now” tab and select “Reset Update.”
  6. Click “Get Updates.”

Additional Tips

  • Ensure that your QuickBooks is up-to-date. Regular updates can prevent many issues.
  • Keep your Windows operating system updated.
  • Maintain a good internet connection while updating QuickBooks.
  • Regularly back up your QuickBooks data to avoid data loss.


QuickBooks Error 15240 can be a hassle, but with the right steps, you can fix it. You can resolve this issue by checking your date and time settings, configuring your internet and firewall settings, and running QuickBooks as an administrator. Remember, keeping your software updated and backing up your data regularly can prevent many problems. If you continue to face issues, consider reaching out to QuickBooks support for further assistance.

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