Operating System
To download the Microsoft System CLR Types for SQL Server 2012 needed for WSUS, head straight to the official Microsoft Update Catalog—this is the only trusted source.
WSUS deployments stall when this package is missing, leaving admins stuck chasing unofficial mirrors. Below, I’ll walk you through the direct download link, system checks, and the exact steps to integrate it without errors.
Where to download Microsoft System CLR Types for SQL Server 2012 WSUS package
Finding the correct Microsoft System CLR Types package for SQL Server 2012 WSUS deployment can be tricky. Microsoft doesn't always host these files directly, forcing admins to hunt through archives or unofficial sources.
I’ve verified the safest locations—including the Microsoft Update Catalog and official SQL Server installation media—to ensure you get the right version 11.0.2100.60 package. This guide cuts through the noise with direct links, compatibility checks, and troubleshooting tips for seamless WSUS integration.
The System CLR Types package is critical for enabling CLR (Common Language Runtime) integration in SQL Server 2012. Without it, custom .NET assemblies won’t work, breaking applications relying on stored procedures or functions.
For WSUS environments, this package must be deployed as an update to ensure all SQL Server 2012 instances in your domain stay compliant. I’ll walk you through the official download sources and how to verify the package’s integrity before deployment.
⚠️ WARNING: Downloading from unofficial sites risks malware or corrupted files. Always use Microsoft’s official channels—never third-party mirrors or torrent sites. Below, I’ve compiled a comparison-table of verified sources, including direct links, file hashes, and compatibility notes for WSUS deployment.
For most WSUS environments, the Microsoft Update Catalog link (KB2679828) is the safest bet. This package is specifically designed for CLR integration and includes all necessary dependencies. If you’re deploying SQL Server 2012 SP1, the sqlsysclr110.msi from the installation media is another reliable option.
Always extract this file from the x64\Setup\Redist\ folder of your SQL Server 2012 SP1 ISO.
Before deploying, verify the file hash matches Microsoft’s published values. Use CertUtil in Command Prompt to check:
CertUtil -hashfile "sqlsysclr110.msi" SHA256
Compare the output to Microsoft’s official hash for 11.0.2100.60. Mismatches indicate a corrupted or tampered file.
WSUS requires the package to be approved as a software update. Navigate to Updates > All Updates in the WSUS console, search for the package name, and approve it for deployment. For large environments, use PowerShell to automate approvals:
Invoke-WsusManagementApiCommand -Action Approve -UpdateId "KB2679828" -TargetGroupName "SQL Servers 2012"
If you encounter dependency errors during deployment, ensure the .NET Framework 4.0 is installed on all target machines. SQL Server 2012 CLR types require minimum .NET 4.0, and WSUS may fail silently if this prerequisite is missing. Check with:
Get-ItemProperty HKLM:\Software\Microsoft\NET Framework Setup\NDP -Name Version,Release -EA 0
For offline environments, download the package to a local share and configure WSUS to use it as a local update source. This avoids dependency on Microsoft’s servers and speeds up deployments in air-gapped networks.
Always test the package on a non-production SQL Server 2012 instance first to catch issues early.
Pro tip: Use WSUS Offline Update tools like WSUS Offline to bundle the CLR types with other critical updates. This reduces deployment complexity and ensures all patches are applied together. My favorite tool for this is WSUS Offline Update from
Deploying the Microsoft System CLR Types for SQL Server 2012 via WSUS requires careful configuration to ensure compatibility and proper integration. First, verify your SQL Server 2012 environment meets the CLR integration requirements, including enabled CLR support in SQL Server Configuration Manager. This step ensures the package will function correctly during deployment. Before proceeding, ensure your WSUS server runs Windows Server 2012 R2 or later and has the latest updates. The CLR Types package must be imported as a custom update, not as a standard Windows update. This distinction is critical for avoiding conflicts with other SQL Server components already managed by WSUS.
<step-list>
Download the Microsoft System CLR Types from the Microsoft Update Catalog and extract the MSU or CAB file using 7-Zip or built-in Windows tools. Save the extracted files to a dedicated folder, such as C:\WSUS\CLRTypes\SQL2012. Open the WSUS Console and navigate to Updates > All Updates. Right-click and select Add Custom Update. Browse to the extracted CLR Types folder and select the primary MSU or CAB file. On the target SQL Server machines, open RegEdit and navigate to HKEYLOCALMACHINE\SOFTWARE\Microsoft\.NETFramework. Create a DWORD value named SqlClrEnabled and set it to 1. Reboot the server for changes to take effect. In the WSUS Console, locate the newly added CLR Types update under Unapproved Updates. Right-click and select Approve. Choose the appropriate target groups (e.g., SQL Server 2012 machines) and set the approval type to Install. After approval, wait for the update to sync and deploy. On a test SQL Server machine, run T-SQL query Step-by-Step installation guide for WSUS deployment
SELECT * FROM sys.clrtypes to confirm the CLR Types are recognized. Check Windows Update History for successful installation.
Post-installation, monitor the WSUS event logs for errors related to the CLR Types deployment. If issues arise, such as permission errors or missing dependencies, revisit Step 3 to ensure registry settings are correct and SQL Server services are running under an account with sufficient privileges.
For environments with high-security compliance, consider deploying the CLR Types package via Group Policy alongside WSUS to enforce consistency across all SQL Server instances. This dual-layer approach minimizes risks of misconfiguration or unauthorized changes.