How Do I Fix a TurboTax Error 1603?

Are you facing the dreaded TurboTax error 1603 while trying to instal or update the popular tax preparation software? In this article, we will take you through some simple and effective solutions that can help you fix the TurboTax error 1603.

Disable anti-virus software

The first step in fixing TurboTax error 1603 is to temporarily disable the anti-virus software. Here’s what you need to do:

  1. Open the anti-virus software and navigate to the “Settings” or “Options” section.
  2. Look for the “real-time protection” or “virus protection” section.
  3. Disable the real-time protection or virus protection temporarily.
  4. Try installing or updating TurboTax again.
  5. Once the installation or update is complete, re-enable the anti-virus software.

Install TurboTax as an Administrator

If disabling the anti-virus software doesn’t solve the TurboTax error 1603, the next step is to instal TurboTax as an administrator. Here’s what you need to do:

  1. Right-click on the TurboTax setup file and select “Run as administrator.”
  2. Follow the on-screen instructions to complete the installation process.

Clean Boot the Computer

If installing TurboTax as an administrator doesn’t solve TurboTax error 1603, the next step is to clean boot the computer. Here’s what you need to do:

  1. Press Windows + R and type “msconfig” in the Run dialogue box.
  2. Click on the “OK” button to open the System Configuration utility.
  3. Navigate to the “Services” tab.
  4. Check the “Hide all Microsoft services” checkbox.
  5. Click on the “Disable All” button.
  6. Navigate to the “Startup” tab.
  7. Click on the “Open Task Manager” link.
  8. Disable all startup items one by one.
  9. Close the Task Manager and click on the “OK” button in the System Configuration utility.
  10. Restart your computer and try installing or updating TurboTax again.


In conclusion, the TurboTax error 1603 can be fixed by disabling the anti-virus software, installing TurboTax as an administrator, or clean booting the computer. If none of these solutions work, you may need to seek professional help or contact the TurboTax support team for assistance.

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