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  ...