How to fix Error 1915 on Windows 11

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Troubleshooting Guide: RPC Error 1915 – Invalid Asynchronous RPC Call Handle

Why This Error Happens

Error 1915 occurs when an application attempts to use an RPC (Remote Procedure Call) handle that has already been closed, released, or was never properly initialized during an asynchronous operation. This typically stems from corrupted RPC runtime files, a mismatch between the RPC client and server call sequence, or third-party software interfering with the RPC subsystem. In some cases, outdated network drivers or incomplete Windows updates can also leave the RPC handle table in an inconsistent state.

Step-by-Step Resolution Guide

Step 1: Restart Core RPC Services

  • Open Services (services.msc) via the Run dialog.
  • Locate Remote Procedure Call (RPC) and RPC Endpoint Mapper, right-click, and select Restart.
  • Ensure both services are set to Automatic startup type to prevent recurrence.

Step 2: Run System File and DISM Scans

  • Open Command Prompt (Admin) or Windows Terminal (Admin).
  • Execute: sfc /scannow to repair corrupted system files, including RPC-related DLLs.
  • Follow up with: DISM /Online /Cleanup-Image /RestoreHealth to fix the underlying Windows image if SFC reports unresolved errors.

Step 3: Update Network and Chipset Drivers

  • Navigate to Device Manager > Network adapters.
  • Right-click your active adapter and select Update driver > Search automatically for drivers.
  • Alternatively, download the latest driver package directly from the manufacturer’s website (Intel, Realtek, etc.) for guaranteed compatibility with Windows 11.

Step 4: Check for Conflicting Third-Party Software

  • Open Task Manager > Startup apps tab.
  • Disable any VPN, antivirus, or backup software known to hook into network/RPC calls (e.g., older firewall suites).
  • Reboot the system and attempt the failing operation again to isolate the conflict.

Step 5: Apply Pending Windows Updates

  • Go to Settings > Windows Update.
  • Install any pending Cumulative Updates or Optional Driver Updates, as Microsoft frequently patches RPC runtime bugs.
  • Restart the PC after installation to fully apply the changes.

Alternative or Verification Steps

  • To verify the fix, re-run the specific action that triggered Error 1915 (e.g., a network scan, print job, or COM+ application call) and monitor the Event Viewer (eventvwr.msc) under Windows Logs > System for recurrence.
  • If the error persists, use winmgmt /verifyrepository and winmgmt /salvagerepository in an elevated Command Prompt, as a corrupted WMI repository can sometimes mimic RPC handle errors.