Fix Microsoft Edge: INET_E_RESOURCE_NOT_FOUND When Opening PDF Files

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Users of Microsoft Edge might encounter an issue where they cannot open PDF files due to an INET_E_RESOURCE_NOT_FOUND error message. This issue can be frustrating, but there are several methods to troubleshoot and resolve it.


The INET_E_RESOURCE_NOT_FOUND error can occur for various reasons, including DNS server issues, outdated DNS cache information, incorrect network settings, and problematic configurations within Microsoft Edge itself. Fortunately, there are various fixes you can try to address this issue.


Changing DNS Settings

The error might stem from DNS server issues. Changing your DNS server to a more reliable one, like Google’s DNS ( and, could resolve the problem. To change your DNS settings:

  1. Go to Control Panel > Network and Internet > Network and Sharing Center.
  2. Click on your connection type (e.g., Ethernet or Wi-Fi) next to “Connections.”
  3. Click “Properties,” select “Internet Protocol Version 4 (TCP/IPv4),” and then click the “Properties” button.
  4. Choose “Use the following DNS server addresses” and enter the Google DNS addresses: Preferred DNS server as and Alternate DNS server as
  5. Click “OK” to save the changes and restart your computer.

Flushing DNS Cache

Sometimes, outdated DNS information stored in your system can cause this error. Flushing the DNS cache can be done through the Command Prompt using the following command:

ipconfig /flushdns

After running the command, restart your computer and check if the issue persists.

Updating Network Drivers

Outdated Wi-Fi or network drivers might also be responsible for this issue. To update your drivers:

  1. Open Device Manager by right-clicking on the Start button and selecting it from the menu.
  2. Expand the “Network adapters” section.
  3. Right-click on your wireless or ethernet adapter and choose “Update driver.”
  4. Select “Search automatically for updated driver software” and follow the prompts.

After updating, restart your device to see if the problem is resolved.

Changing User Account Control (UAC) Settings

Incorrectly configured UAC settings in Windows might prevent Edge from functioning properly. To adjust these settings:

  1. Type “UAC” in the Windows search bar and click on “Change User Account Control settings.”
  2. Adjust the slider to a more moderate level, which allows you to be notified about changes to your computer without being too restrictive.
  3. Click “OK” to apply the changes.

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Renaming Connections Folder in Registry

  1. Press Windows Key + R, type “regedit,” and press Enter to open the Registry Editor.
  2. Navigate to HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections.
  3. Right-click on the “Connections” folder and choose “Rename.”
  4. Rename it to something like “Connections.old.”
  5. Restart your computer and check if the issue has been resolved.

Disabling TCP Fast Open in Edge

  1. Launch Microsoft Edge.
  2. Type edge://flags/ in the address bar and press Enter.
  3. Search for “TCP Fast Open” and select “Disabled” from the dropdown menu.
  4. Restart Edge and try to open a PDF file.

Using Private Browsing Session

Opening an InPrivate browsing session in Edge can sometimes bypass this error. To start an InPrivate session, click on the three dots in the top right corner of Edge and select “New InPrivate window.” Try accessing the PDF file again in this mode.

Resetting Microsoft Edge

If none of the above methods work, resetting Edge to its default settings or repairing it through Windows Settings can be a final resort. To reset Edge:

  1. Go to Settings > Apps > Apps & features.
  2. Find Microsoft Edge in the list, click on it, and then select “Advanced options.”
  3. Scroll down and click the “Reset” button.


The INET_E_RESOURCE_NOT_FOUND error preventing PDFs from opening in Microsoft Edge can be addressed through a variety of fixes, such as changing DNS settings, flushing DNS cache, updating network drivers, and more. By following these steps, you should be able to overcome the issue and restore full functionality to Edge for your PDF viewing needs. If the problem persists after trying all the proposed solutions, consider reaching out to Microsoft support for further assistance.


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