Windows has a built-in security system called Windows Security, which is designed to protect against a range of different threats such as viruses, malware, ransomware etc. While it works great most of the time, you might get an error message saying that “Your Internet security settings prevented one or more files from being opened.” Blocking access to files, folders, or applications usually appears after upgrading to a newer version of Windows. But there are some fixes, so follow along as we guide you through them.

Takeaways:

  1. Learn Windows 11 error - "Your Internet Security Settings Prevented One or More Files from Being Opened"
  2. What is causing - "Your Internet Security Settings Prevented One or More Files from Being Opened Error in Windows 11"

How to Fix - Your Internet Security Settings Prevented One or More Files from Being Opened Error in Windows 11

The error appears when Windows security features like Windows Security, Internet Options, or SmartScreen block a file or app they consider unsafe. These tools scan files, check their reputation, and either allow, block, or prompt before opening to protect the system from malicious content. While you may sometimes get annoying false positives, you shouldn't simply disregard them. However, if you are 100% sure the file/s are safe, then you can do the following. Again, though, this tool is designed to protect you.

Reconfigure Internet Settings via Command Prompt

  • Press Windows + X and select Command Prompt (Admin).
  • Enter each of the following commands, pressing Enter after each:

How to Fix Your Internet Security Settings Prevented One or More Files from Being Opened Error in Windows 11

netsh int tcp set heuristics disabled

netsh int tcp set global autotuninglevel=disabled

netsh int tcp set global rss=enabled

netsh winsock reset

netsh int ip reset

ipconfig /release

ipconfig /renew

ipconfig /flushdns

  • Restart your computer and check if the problem persists.

Reset Internet Options

  • Search for Internet Options and open it.
  • Go to the Advanced tab and click Restore advanced settings.
  • Switch to the Security tab and click Reset all zones to default level.
  • Click Apply, then OK.

Check Internet Zone Settings

  • Press Windows + R, type inetcpl.cpl, and press Enter.
  • In the Security tab, select Custom level.
  • In the Security Settings – Internet Zone window, scroll to Miscellaneous.
  • Set Launching applications and unsafe files to Prompt (recommended).
  • Click OK, then Apply to save changes.

Disable SmartScreen Filter (Optional)

  • Open Windows Security and go to App & browser control.
  • Under Reputation-based protection, you can turn off:
    • Check apps and files
    • SmartScreen for Microsoft Edge
    • SmartScreen for Microsoft Store apps
  • Toggle the desired switches to Off and check if the issue is resolved.

your Internet Security Settings Prevented One or More Files from Being Opened Error solution

Manually Allow a Blocked File or App

  • Open Windows Security.
  • Go to Virus & threat protection and select Protection history.
  • Find the blocked app or file you want to allow.
  • Click Actions and choose Allow on device.
  • Confirm the choice if prompted by User Account Control.