Tip: You may run the script from an elevated Command Prompt as well using Powershell.exe -File C:\users\Martin\Downloads\files.ps1 Navigate to the folder the PowerShell script is in, e.g.Open an elevated PowerShell prompt (Open Start, type powershell, right-click on the result and select run as administrator).Paste the content in a new plain text document.Copy the entire script from the linked website.Here is a short guide on using the script if you are new to PowerShell or never worked with scripts before:

The script removes all items under HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.xxx\UserChoice for file extensions and creates values under the OpenWithProgids and OpenWithList keys to fix it. It is highly recommended that you back up the Registry, create a System Restore point, or back up the entire system before running it on machines affected by the issue. The script makes bulk changes to file associations in the Windows Registry. You can check out the script here (via Woody). The company notes that subsequent attempts to change file associations may work and that it is working on a fix for the issue that it hopes will be available in late November 2018.Ī PowerShell script has been created to address the issue. In some cases, Microsoft Notepad or other Win32 programs cannot be set as the default.