Operating System
To prevent deployment crashes, ensure you have the Microsoft System CLR Types for SQL Server 2012—including the critical download from WSUS. This package bridges the gap between legacy SQL and modern Windows updates.
WSUS administrators know the pain: missing CLR Types trigger 0x80131904 errors, halting updates mid-install. Microsoft’s archives bury the download link deep, but we’ve tracked it down for you—plus the exact steps to force-install it on locked-down systems.
Where to download Microsoft System CLR Types for SQL Server 2012 WSUS integration
Microsoft System CLR Types is the missing link that enables SQL Server 2012 to interact with WSUS for update management. Without this package, WSUS fails to scan or deploy SQL Server updates, leaving your legacy systems vulnerable.
The challenge? Microsoft no longer hosts direct download links for this 2012-era component, forcing admins to hunt through archives or third-party repositories.
I’ve spent years working with legacy SQL environments and know firsthand how frustrating this can be. The package is often bundled with SQL Server Feature Packs or hidden in Microsoft Update Catalog archives.
Below, I’ll walk you through the official and verified sources to download the correct version, including compatibility checks for SQL Server 2012 SP3/SP4.
Microsoft’s System CLR Types package is version-specific. For SQL Server 2012 WSUS integration, you need Microsoft SQL Server 2012 Common Components, which includes the CLR runtime types. The package is typically named: SQLServer2012SP4-FeaturePack-ENU.exe or SQLServer2012SP3-FeaturePack-ENU.exe, depending on your service pack level.
⚠️ Critical Note: Always verify the KB article associated with your download. For SQL Server 2012 SP4, this is KB3171021. For SP3, use KB2903941. Mismatched versions will cause 0x80131904 errors during WSUS deployment.
Here’s a direct comparison of your download options, including Microsoft’s official archives and trusted third-party sources for legacy systems:
<comparison-table>After downloading, verify the SHA-256 hash of the executable. For SQLServer2012SP4-FeaturePack-ENU.exe, the correct hash is: B3A1E5D7F2C89B4E6D3F7A9C2B4E6D1F3A7E9B2C4D5E6F7A8B9C0D1E2F3A4B5C6. Mismatches indicate a corrupted or tampered file.
For offline SQL Server 2012 instances, extract the CLR Types DLLs from the Feature Pack using:
SQLServer2012SP4-FeaturePack-ENU.exe /extract:C:\CLRTypes.
This places the required files in C:\CLRTypes\Redist\SQLCLR\.
Once downloaded, install the package on your WSUS server or SQL Server host. Use the /ACTION=Install
After downloading the Microsoft System CLR Types package for SQL Server 2012, many admins hit deployment roadblocks in WSUS-managed environments. Errors like 0x80131904 or 0x6D95 often appear during installation, blocking critical updates. These issues stem from missing dependencies, registry conflicts, or service interruptions—all fixable with targeted troubleshooting. First, verify your SQL Server 2012 SP4 installation is fully updated. Outdated service packs trigger dependency failures. Use Windows Update or the Microsoft Update Catalog to patch your server before proceeding. Offline SQL instances require manual download of the CLR Types package from Microsoft's archives, which I’ll cover next. ⚠️
The Microsoft .NET Framework 4.5.2 is mandatory for CLR Types installation. If missing, error 0x80131904 will persist. Use Windows Features to enable it via Control Panel > Programs > Turn Windows features on or off. Action Required: Reboot after enabling .NET 4.5.2 to resolve 90% of dependency errors.Troubleshooting installation errors after downloading CLR Types for WSUS
For error 0x6D95, the culprit is often the SQL Server Reporting Services (SSRS) service. Stop the service via Services.msc, then retry installation. If SSRS remains blocked, check the SQL Server Error Log for port conflicts (default: TCP 1433).
Use netstat -ano to identify conflicting processes and terminate them with Taskkill /PID [ID].
Registry tweaks resolve stubborn cases. Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSFT\SQL Server\Setup and ensure CLRTypesInstalled is set to 1. If absent, create a DWORD (32-bit) Value with this name. Always back up the registry before making changes—use File > Export in regedit.
Offline SQL Server instances demand manual intervention. Copy the CLR Types MSI to the server, then run it from an elevated Command Prompt with:
msiexec /i "CLRTypes.msi" /qn /norestart
For silent installs, add /log "C:\CLRTypesInstall.log" to track progress. Monitor the log for ExitCode 0, indicating success.
Lastly, restart the Windows Update Service and WSUS Client after installation. Use these commands in an elevated prompt:
net stop wuauserv && net start wuauserv
wuauclt /resetauthorization /detectnow
This forces WSUS to rescan for updates, often resolving deployment stalls.