How to fix Error 1759 on Windows 11

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Windows 11 Troubleshooting Guide: Error 1759 – “The Interface Was Not Found”

Why This Error Happens

Error 1759 typically occurs when the Remote Procedure Call (RPC) interface required by a service or application is missing, unregistered, or corrupted within the Windows component store. This often results from a mismatched or outdated RPC endpoint mapper, a corrupted system file (such as a DLL tied to the RPC service), or an incomplete Windows update that failed to properly register the required interface. In some cases, third-party security software can also block or interfere with the RPC communication channel, triggering this error.

Step-by-Step Resolution Guide

Step 1: Verify the RPC Service Status

  • Press Win + R, type services.msc, and hit Enter.
  • Locate Remote Procedure Call (RPC) and ensure the Status is “Running” and Startup Type is “Automatic.”
  • Right-click and select Restart if the service appears stalled or unresponsive.

Step 2: Run System File Checker and DISM

  • Open Command Prompt as Administrator (Win + X → “Terminal (Admin)”).
  • Run the command: sfc /scannow to scan for and repair corrupted system files.
  • Follow up with: DISM /Online /Cleanup-Image /RestoreHealth to repair the underlying Windows image if SFC finds unfixable errors.

Step 3: Re-register the Affected DLL Files

  • Identify the specific DLL associated with the failing interface (often found in the error logs under Event Viewer > Windows Logs > System).
  • Open Command Prompt as Administrator and navigate to C:\Windows\System32.
  • Run regsvr32 [filename].dll to re-register the missing interface component.

Step 4: Check for Pending Windows Updates

  • Navigate to Settings > Windows Update.
  • Click Check for updates and install any pending cumulative updates, as these often contain patches for corrupted RPC interfaces.
  • Restart the PC once the updates are fully installed.

Alternative or Verification Steps

  • To verify the fix, reopen the application or service that originally threw Error 1759 and confirm the action completes without the “interface not found” pop-up.
  • If the error persists, consider performing a System Restore to a point before the error began occurring, as this can roll back a corrupted update or driver that damaged the interface registration.