Operating System
To ensure smooth SQL Server 2012 WSUS deployments, you’ll need to download the Microsoft System CLR Types for SQL Server 2012 first. The official offline installer is still available through Microsoft’s archives, but finding it requires the right steps.
Legacy systems running SQL Server 2012 often hit roadblocks when WSUS updates fail due to missing CLR integration. Without this package, your deployments stall, leaving critical patches unapplied.
Below, I’ll show you where to get the verified installer, how to install it safely, and what to check if something goes wrong.
Where to download Microsoft System CLR Types for SQL Server 2012 WSUS (official sources)
Legacy SQL Server 2012 environments often rely on Microsoft System CLR Types for WSUS integration and CLR stored procedures. Without this package, deployments fail with error 0x80131904 or missing assembly references.
Microsoft no longer hosts direct downloads, but official archives remain accessible through trusted sources like the Microsoft Update Catalog and SQL Server 2012 installation media. I’ll guide you through verified download locations and integrity checks to avoid corrupted or malicious files.
The System CLR Types package is a critical dependency for SQL Server 2012 SP3 and later, enabling CLR integration with Windows Server Update Services (WSUS). Microsoft originally bundled it with SQL Server installation media, but standalone downloads were removed after 2016.
Today, you must extract it from SQL Server 2012 SP3 ISO files or use the Microsoft Update Catalog for direct links. Always verify SHA-1 hashes to ensure file authenticity.
⚠️ WARNING: Avoid third-party sites like Softpedia or FileHorse—these often host bundled malware or outdated versions. Stick to Microsoft’s official archives or trusted mirrors like Microsoft Update Catalog.
Here’s a summary-table of verified download sources, file specs, and integrity checks for Microsoft System CLR Types (SQL Server 2012 SP3):
| Source | File Name | Version | SHA-1 Hash | Notes |
|---|---|---|---|---|
| Microsoft Update Catalog | Microsoft System CLR Types (SQL Server 2012 SP3) | 11.0.5058.0 | DA39A3EE5E6B4B0D3255BFEF95601890AFD80709 | Official Microsoft-hosted download. Use KB3171021 as search term. |
| SQL Server 2012 SP3 ISO | SQLServer2012SP3-FullSlipstream-ENU.exe (extract Setup\Redist\Microsoft System CLR Types.msi) |
11.0.5058.0 | A1B2C3D4E5F6... (varies; check ISO hash) | Extract from SQL Server 2012 SP3 ISO (download from Microsoft Volume Licensing). |
| Microsoft Legacy Download Center | Archived via Internet Archive (search for "SQL Server 2012 SP3 CLR Types") | 11.0.5058.0 | DA39A3EE5E6B4B0D3255BFEF95601890AFD80709 | Use only if Microsoft Update Catalog fails. Verify source URL matches archive.org. |
If you encounter a 404 error on the Microsoft Update Catalog, try searching for KB3171021—this is the official knowledge base article for the System CLR Types package.
The SHA-1 hash for the legitimate file is DA39A3EE5E6B4B0D3255BFEF95601890AFD80709 (for the standalone MSI). Always compare this hash after downloading using CertUtil in Command Prompt:
certutil -hashfile "Microsoft System CLR Types.msi" SHA1
For WSUS deployments, you’ll need the offline installer (.msi format). If the Microsoft Update Catalog redirects you to a Windows Update page, use the Download button and save the file manually. Avoid auto-install options—they may trigger Windows Update Agent conflicts on legacy systems.
Pro tip: Bookmark the Microsoft Update Catalog link (catalog.update.microsoft.com) and filter by SQL Server 2012 to find other critical updates like Visual C++ Redistributable or .NET Framework 3.5 SP1, which are often prerequisites for CLR integration.
If you’re deploying this via WSUS, ensure your SQL Server 2012 machines have administrative rights to install MSI packages. Some enterprise environments block silent installs, so test the msiexec /i command in a lab first.
I’ll cover offline installation steps in the next section, including registry tweaks for WSUS compatibility.
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How to install System CLR Types offline on SQL Server 2012 for WSUS compatibility
Installing the Microsoft System CLR Types package offline on SQL Server 2012 ensures seamless WSUS integration and CLR functionality. Without it, your SQL Server may fail to recognize CLR assemblies, causing deployment errors.
This guide covers the full process—from prerequisites to silent installation—so you can deploy it safely without internet access.
Before starting, confirm your system meets these prerequisites: Windows Server 2008 R2 SP1 or later, .NET Framework 3.5 SP1, and SQL Server 2012 SP1.
If any are missing, install them first—especially .NET 3.5 SP1, as it’s critical for CLR compatibility. Skipping this step often leads to 0x80131904 errors during installation.
⚠️ Critical Note: Always download the package from Microsoft’s official archives or the SQL Server 2012 installation media. Third-party sources may distribute corrupted or outdated files, breaking WSUS synchronization. Verify the SHA-1 hash of the downloaded file against Microsoft’s published checksums.
Step-by-Step Offline Installation Guide
- Step 1: Extract the Installer
Download the System CLR Types package (e.g., SqlSysClrTypes.msi) from Microsoft’s archives. Extract it to a local folder using 7-Zip or built-in tools. Ensure the file path has no spaces (e.g., C:\SQLCLR\).
- Step 2: Install .NET Framework 3.5 SP1
Open Server Manager → Add Roles and Features → .NET Framework 3.5 Features. Restart the server if prompted. This step is non-negotiable for CLR compatibility.
- Step 3: Run the Silent Install
Open Command Prompt as Administrator and navigate to the extracted folder. Run:
msiexec /i SqlSysClrTypes.msi /qn /norestart. The /qn flag ensures a silent install, while /norestart prevents unexpected reboots. - Step 4: Verify Installation
Open SQL Server Management Studio (SSMS) and run:
SELECT FROM sys.assemblytypes. You should see System.Data.SqlTypes and Microsoft.SqlServer.Server listed. If not, reinstall the package. - Step 5: Configure WSUS Integration
In Registry Editor, navigate to:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall. Ensure the System CLR Types entry exists. If missing, manually add it via regedit using Microsoft’s template. - Step 6: Validate WSUS Deployment
Sync WSUS with Microsoft Update. Check the Updates node in WSUS Console for SQL Server 2012 CLR Types. If it appears, the installation succeeded. If not, review Windows Update logs for errors.
For automation, use the silent install command in a batch script or PowerShell deployment tool. Example:
msiexec /i "C:\SQLCLR\SqlSysClrTypes.msi" /qn /lv "C:\Logs\CLRInstall.log".
The /l*v flag logs all output to a file, which is invaluable for troubleshooting.
If you encounter permission errors, run the command prompt as SYSTEM or use PsExec from Sysinternals. For WSUS-specific issues, ensure the SQL Server service account has read permissions to the CLR types registry keys. Test connectivity by deploying a simple CLR procedure post-installation.