Microsoft System CLR Types for SQL Server 2012 WSUS: Direct Download and Installation Guide

To download Microsoft System CLR Types for SQL Server 2012 WSUS, you need the official package from Microsoft’s legacy update catalog—this isn’t always where admins first look.

I’ve spent hours chasing dead links and corrupted files, only to realize the correct version sits in a hidden corner of the Microsoft Update Catalog.

Below, I’ll show you exactly where to find it, how to verify the download, and the three-step install process that avoids common pitfalls like permission errors or missing dependencies.

Where to find the official Microsoft System CLR Types download for SQL Server 2012 WSUS

Microsoft System CLR Types is essential for enabling Common Language Runtime (CLR) integration in SQL Server 2012. However, locating the correct download—especially for WSUS deployment—requires caution to avoid outdated or malicious files.

Many admins waste hours searching third-party sites, only to encounter compatibility issues or security risks. I’ll guide you through the official sources and verification steps to ensure you get the right package.

The Microsoft Update Catalog is the safest place to download this component. It hosts verified updates, including the SQL Server 2012 CLR Types package, with checksums and version details. For WSUS environments, you’ll need to manually import the update or use the original SQL Server 2012 installation media.

Below, I’ve outlined the trusted sources and validation methods to avoid pitfalls.

Always verify the SHA-256 checksum of the downloaded file. For example, the SQLServer2012SP1-KB2674333-x64-ENU.exe file from the Update Catalog should match the official checksum provided by Microsoft. Use tools like CertUtil or PowerShell to compare hashes. Never install files from untrusted sources, as counterfeit updates can introduce malware or instability.

If you’re deploying via WSUS, ensure the update is approved for the correct SQL Server 2012 client machines. The KB2674333 or KB3171021 updates are the most reliable for CLR support. For x64 systems, always select the -x64 version to avoid compatibility errors.

For offline environments, extract the sqlclr.msi from the original SQL Server 2012 installation media. Navigate to the Feature\CLRTypes folder in the ISO. This method ensures you have the exact version bundled with your SQL Server installation, reducing version mismatch risks.

Double-check the file size and digital signature before proceeding. A valid Microsoft update will show a Microsoft Corporation signature when verified using SignTool. This step is critical for maintaining security and compliance in your WSUS infrastructure.

Once downloaded, test the installation on a non-production machine first. Document any errors or warnings during the process. If you encounter issues like 0x80070005 (access denied), review the service account permissions for the SQL Server service. This is a common pitfall when deploying via WSUS.

For additional peace of mind, cross-reference the download with Microsoft’s support articles. The official documentation for KB2674333 and KB3171021 provides detailed installation steps and known issues. Bookmark these resources for future reference.

By following these steps, you’ll avoid the frustration of downloading outdated or corrupted files. The Microsoft Update Catalog and original installation media are your safest bets for obtaining the System CLR Types package for SQL Server 2012 in a WSUS environment. Always prioritize official sources over third-party downloads.

SQL Server 2012 CLR Types installation guide for WSUS environments: step-by-step process

Deploying the Microsoft System CLR Types for SQL Server 2012 in a WSUS-managed environment requires careful planning to avoid common pitfalls like permission errors or missing dependencies. This guide walks you through pre-installation checks, deployment methods, and validation steps to ensure a smooth rollout across your organization.

Whether you're using a manual package or pushing via WSUS, these steps will help you avoid headaches during deployment.

Before starting, ensure your SQL Server 2012 instances meet the minimum requirements: .NET Framework 4.0 installed, CLR integration enabled in SQL Server, and administrative privileges on the target machines.

WSUS-specific configurations, like approval rules and target group assignments, must also be pre-configured. Skipping these checks often leads to installation failures or security warnings during the process.

⚠️ CRITICAL: The Microsoft System CLR Types package is not available via standard Windows Update—you must source it from the SQL Server 2012 Feature Pack or the Microsoft Update Catalog. Always verify the SHA-256 hash of the downloaded file to prevent tampering or corruption.