This error is most common when installing the NuGet provider or modules like AzureAD, Microsoft.Graph, or ExchangeOnlineManagement. Core Cause: Outdated TLS Protocols
Retry your download or installation (e.g., Install-Module -Name PowerShellGet ).
Trying to install program using Powershell and getting this error This error is most common when installing the
[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12 Use code with caution.
If you are encountering the error , you are likely trying to install a PowerShell module or run a Microsoft-related installer behind a security layer that doesn't recognize your connection. If you are encountering the error , you
The fastest way to resolve this is to manually set the security protocol for your current PowerShell session. Open as an Administrator . Run the following command: powershell
The primary reason for this failure is that older versions of Windows and PowerShell (specifically 5.1 and earlier) default to . However, Microsoft’s download servers and the PowerShell Gallery now require TLS 1.2 or higher for all connections to ensure security. Step 1: Force PowerShell to Use TLS 1.2 (Immediate Fix) Run the following command: powershell The primary reason
To avoid running the command every time, you can enable "Strong Cryptography" in the Windows Registry. This forces all .NET applications (including PowerShell) to use the latest TLS version available. Run these commands in an elevated PowerShell window: