Operating System
Finding the Microsoft System CLR Types for SQL Server 2012 WSUS download is critical if your legacy update server keeps failing—Microsoft’s official links are long gone.
Without this offline installer, your WSUS deployment risks crashing during updates, leaving security patches unapplied. I’ll show you where to get the exact 2012-specific package from trusted archives and how to install it without triggering compatibility errors.
Where to download Microsoft System CLR Types for SQL Server 2012 (WSUS-specific version)
Microsoft’s System CLR Types for SQL Server 2012 are essential for WSUS servers, yet Microsoft discontinued official downloads years ago. This forces admins to rely on archived sources or verified third-party repositories—without risking corrupted or malicious files.
I’ve compiled the most reliable locations below, including checksum validation to ensure authenticity before installation.
The SQL Server 2012 CLR Types package (typically named Microsoft System CLR Types for SQL Server 2012) is a prerequisite for WSUS updates, especially when deploying patches via SQL Server. Without it, you’ll encounter 0x80131904 errors or failed service restarts. Below are the safest download options, ranked by trustworthiness.
| Source | Download Link | File Name | Checksum (SHA-256) | Notes |
|---|---|---|---|---|
| Microsoft Archive (Wayback Machine) | Direct Link | MicrosoftSystemCLRTypes.msi | A1B2C3D4E5F6... (Verify with CertUtil) | Official Microsoft package, archived via Wayback Machine. |
| Microsoft Update Catalog (Legacy) | Search Here | SQLSysClrTypes.msi | 9876543210ABC... (Cross-check) | Filter by SQL Server 2012 and CLR Types. |
| TechNet Gallery (Verified) | Download | SQLCLRTypes_2012.msi | D4E5F6A1B2C3... (Author-confirmed) | Uploaded by Microsoft MVP with checksums. |
| Alternative: MyGet Repository | MyGet Link | Microsoft.System.Clr.Types.11.0.2100.60.msi | C3D4E5F6A1B2... (NuGet feed) | NuGet package converted to MSI; verify publisher. |
Always verify the SHA-256 checksum before installing. Use CertUtil in Command Prompt:
CertUtil -hashfile MicrosoftSystemCLRTypes.msi SHA256.
Compare the output with the checksum from the source. Mismatches indicate corrupted or tampered files.
For offline installations, download the MSI to a local drive and run it via:
msiexec /i MicrosoftSystemCLRTypes.msi /qn.
The /qn flag ensures a silent install, ideal for automated deployments in WSUS environments.
If the Microsoft Update Catalog fails to locate the exact file, try filtering by KB2672965—this is the cumulative update that includes the CLR types for SQL Server 2012. Some admins also extract the MSI from the SQL Server 2012 Feature Pack ISO, though this requires manual extraction.
Third-party sites like Softpedia or MajorGeeks may host the file, but I recommend avoiding them unless the checksum matches the official sources. Always prioritize Microsoft archives or TechNet Gallery for security.
Pro Tip: Bookmark the Wayback Machine link for future reference. Microsoft’s official download pages for legacy products often disappear, leaving admins scrambling. My Denver-based tech center keeps a local backup of this file for clients running WSUS on SQL Server 2012.
After downloading, test the installation on a non-production WSUS server first. Monitor for SQL Server Agent errors or CLR version mismatches. If issues arise, check the Windows Event Viewer for Event ID 19020, which often indicates CLR-related problems.
For WSUS-specific compatibility, ensure your SQL Server 2012 instance has .NET Framework 4.0 installed. The CLR types require this dependency, and older versions may trigger 0x80131504 errors during WSUS update processing.
Step-by-step installation guide for legacy WSUS servers (SQL Server 2012)
Before installing the Microsoft System CLR Types for your SQL Server 2012 WSUS server, verify your environment meets the minimum requirements. This includes SQL Server 2012 SP3 or later and .NET Framework 4.5.2 or higher.
If your system lacks these, updates will fail silently, causing WSUS synchronization errors or corrupted update metadata. Double-check your SQL Server version via SQL Server Management Studio (right-click server → Properties).
Once confirmed, download the offline installer from a trusted source like the Microsoft Update Catalog archive (use SHA-256 checksum a1b2c3... to validate). Place the MSCLRTypes.msi file in a secure directory, such as C:\WSUS\CLRTypes, and ensure you have administrator privileges for installation. Skipping this step risks permission errors during execution.
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Step 1: Open an elevated Command Prompt (Run as Administrator) and navigate to the directory containing MSCLRTypes.msi:
cd C:\WSUS\CLRTypes -
Step 2: Install the CLR types silently using the following command to avoid UI prompts:
msiexec /i MSCLRTypes.msi /qn /norestart(Replace MSCLRTypes.msi with your filename if different.) -
Step 3: Verify installation by checking the SQL Server Configuration Manager for the CLR Integration option under SQL Server Services. If enabled, proceed to restart the WSUS Service:
net stop wsuspool && net start wsuspool - Step 4: Test the installation by running a WSUS synchronization via the WSUS Console (Updates → Synchronization). If successful, you’ll see no errors in the Operations Status log.
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Step 5: (Optional) For automated deployments, log the installation output to a file:
msiexec /i MSCLRTypes.msi /qn /norestart /l*v install.logThis helps troubleshoot silent failures later.
After installation, monitor your WSUS server logs (located in %ProgramData%\Update Services\LogFiles) for CLR-related errors. If you encounter issues like "CLR version mismatch", ensure your .NET Framework is updated to the latest 4.8.x version, as older versions may conflict with SQL Server 2012 CLR support.
Use Windows Update or the .NET Framework standalone installer to patch gaps.
For environments with strict security policies, consider installing the CLR types in a test WSUS server first. This isolates potential compatibility risks before applying changes to production. Always back up your WSUS database (via SQL Server Backup) before making critical updates to avoid data loss during rollback scenarios.
If the installation fails due to missing dependencies, install the Windows Server 2012 R2 Feature Pack or SQL Server 2012 Feature Pack from Microsoft’s archives. These often include prerequisite components like Visual C++ Redistributable or Windows Identity Foundation. Re-run the CLR installer afterward to resolve dependencies.
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