When attempting to install modules from the Powershell Gallery, you may get errors on older versions of Windows Server (2008-2012R2), even after updating PowerShell to more recent versions. The errors are concerning unable to install the NuGet provider, required to download packages from PSGallery.

Errors are similar to:

WARNING: Unable to download from URI.

WARNING: Unable to download the list of available providers. Check your internet connection.

Unable to find package provider 'NuGet'. It may not be imported yet.

The reason for this is a problem with the cryptographic providers enabled on your system. PowerShell 5.1 enables SSL 3.0 and TLS 1.0 for secure HTTP connections, which are  ...

When installing Powershell modules from the gallery, you may run into the following error, particularly on older versions of Windows (even Windows 10):

PS C:\WINDOWS\system32> Install-Module -Scope AllUsers -Name module-nameWARNING: Unable to resolve package source 'https://www.powershellgallery.com/api/v2/'.PackageManagement\Install-Package : No match was found for the specified search criteria and module name 'module-name'. Try Get-PSRepository to see all available registered module repositories.

The most common reason for this (aside of having some other issue with internet access) is that Powershell may still be using TLS 1.0, which is no longer supported by Powershell Gallery.

To   ...