Windows 10 Tutorials 74 – How to Unblock a File

Welcome to our series of Microsoft Windows 10 tutorials that help you understand the features of the upcoming Windows 10.

This tutorial will show you how to Unblock a File which has been blocked by Windows SmartScreen or Open File – Security Warning in Windows 10.

Windows 10 has two built in security features to prevent user from running unauthorized or unknown files.

When you try to access these files or apps, you will be warned by Windows SmartScreen or Open File – Security Warning and you can choose to run files which you know are safe and you can trust.

Unblock file in Open File – Security Warning:

  1. Open the unknown or blocked file to trigger the Open File – Security Warning prompt.
  2. In the warning prompt, uncheck the box Always ask before opening this file, and Open or Run the file.
  3. If prompted by UAC, click on Yes (if administrator) or enter administrator password.

Unblock app or file in Windows SmartScreen:

  1. Open the unknown or blocked app/file to trigger the Windows SmartScreen.
  2. Click on the More info link as shown in the image below.
  3. Click on the Run anyway button to run the app/file.

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Unblock file in File Properties:

  1. Right click on the blocked file, and select Properties.
  2. Go to General tab and check the Unblock box at the bottom.
  3. If prompted, click on Continue.
  4. Click on Yes (if administrator) or enter administrator password.
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