You should also uninstall older versions of PowerShell. If you’re not running the latest version of Windows 10, your version of PowerShell might not be the latest and that’s why the command might be failing. You should also make sure that you’re running the latest version of PowerShell. Once you enable the proxy for PowerShell, run the Register command again and then try installing the module. If you’re using a proxy via a desktop app, it is highly likely PowerShell is bypassing it. If disabling the proxy is not an option, you need to enable the proxy for PowerShell as well. It’s worth running the Register command again after disabling the proxy before you attempt to install a module. If you’re using a VPN or a Proxy service, disable it and then try installing the module again. This could be a problem with your internet. Other reasons this error may appear is if PowerShell is unable to communicate with the repository that you want to add. The command re-registers the repository gallery which is why, in most cases, it will fix the problem.

The ‘Unable to find module repositories’ error appears when PowerShell cannot find the repository that you’re adding, or the module that you’re trying to add since it too comes from a repository. The command completes within a few seconds. Run the command to install a module or add a repository and this time, it should work. Once the command has run, the problem should be resolved. Open PowerShell with admin rights and run the following command Register-PSRepository -Default

Unable to find module info file