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Fixing VSS Error: Unexpected Error During CoCreateInstance Routine Execution

2024/11/15
PC Repair

Key Notes

  • Ensuring the VSS service is running is crucial for backups.
  • Registering VSS components can resolve glitches.
  • System Image repairs can address corrupted files leading to VSS errors.

Quick Solutions to Fix VSS Error: CoCreateInstance and Event ID 8193

Discover effective strategies for troubleshooting the VSS error related to Event ID 8193, ensuring your backup operations run smoothly.

Step-by-Step Solutions for VSS Error Code 8193

Step 1: Verify the VSS Service Status

Begin by checking that the Volume Shadow Copy Service is running. This service must be active to facilitate file and volume backups efficiently.

To verify the service status, follow these steps:

  1. Open the Services application from the Start Menu.
  2. Find the Volume Shadow Copy service, right-click it, and select Properties.
  3. If it shows as Stopped, set the Startup type to Automatic (Delayed Start) and click Start.
  4. Hit Apply and then OK.

If the service is already running, simply restart it. Afterward, reboot your computer and check the Event Viewer for successful VSS entries.

Step 2: Re-register VSS Components

Sometimes, the VSS may malfunction due to component registration issues. You can manually re-register the necessary DLL files to ensure proper operation.

To do this, follow these instructions:

  1. Open the Run dialog by pressing Windows + R, type cmd, and press Ctrl + Shift + Enter to open Command Prompt as an administrator.
  2. In the Command Prompt, input the following commands one by one:

regsvr32 ole32.dll

regsvr32 vss_ps.dll

regsvr32 /i swprv.dll

regsvr32 /i eventcls.dll

regsvr32 es.dll

regsvr32 stdprov.dll

regsvr32 vssui.dll

regsvr32 msxml.dll

regsvr32 msxml3.dll

regsvr32 msxml4.dll

After running these commands, reboot your system and check for any persisting issues.

Step 3: Check Network Service Account Permissions

In some cases, inadequate permissions can lead to the VSS error. The Event ID 8193 may indicate access denials rooted in inadequate permissions on the Diag registry key.

Before proceeding, back up your registry. Follow these steps to address permission problems:

  1. Access the Registry Editor via the Start Menu.
  2. Navigate to Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\VSS\Diag.
  3. Right-click on the Diag folder and choose Properties.
  4. Select NETWORK SERVICE in the Security tab, grant Full Control permissions, and click OK.
  5. Close the Registry Editor.

Now restart your PC and verify if the issue persists.

Step 4: Repair Your System Image

If core VSS components are corrupted, the error may appear. Repairing your system image can alleviate this issue.

To do so, open Command Prompt as an administrator, and execute the following commands:

sfc /scannow

Dism /Online /Cleanup-Image /ScanHealth

Dism /Online /Cleanup-Image /CheckHealth

Dism /Online /Cleanup-Image /RestoreHealth

Run these commands one at a time. Once completed, attempt another backup to confirm the issue is resolved.

Additional Tips

  • Ensure you have adequate disk space allocated for shadow copies.
  • Manually review and clean up old shadow copies.
  • Utilize System Restore points for additional backup measures.

Summary

This guide provided actionable solutions for resolving the VSS error: Unexpected error calling routine CoCreateInstance, corresponding to Event ID 8193. Following these steps will help ensure your backup processes are uninterrupted and reliable.

Conclusion

Addressing the VSS error effectively requires diligence and systematic troubleshooting. Implement these strategies to ensure that your backup system remains robust and operational, preparing you for any future recovery scenarios.

FAQ (Frequently Asked Questions)

What does the VSS unexpected error mean?

The VSS unexpected error typically indicates that there is insufficient disk space available for creating shadow copies, necessitating an increase in allocated space.

How can I check my VSS settings?

You can check your VSS settings by opening Command Prompt as an administrator. Use the command vssadmin list writers to view VSS writers and their states.

PC Repair