What are previews_opt_out.db Error Messages?

General previews_opt_out.db Runtime Errors

previews_opt_out.db file errors often occur during the startup phase of Comodo Dragon, but can also occur while the program is running. These types DB errors are also known as “runtime errors” because they occur while Comodo Dragon is running. Here are some of the most common previews_opt_out.db runtime errors:

• previews_opt_out.db could not be found.
• previews_opt_out.db error.
• previews_opt_out.db failed to load.
• Error loading previews_opt_out.db.
• Failed to register previews_opt_out.db / Cannot register previews_opt_out.db.
• Runtime Error - previews_opt_out.db.
• The file previews_opt_out.db is missing or corrupt.

Most DB errors are due to missing or corrupt files. Your previews_opt_out.db file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with Comodo Dragon), or deleted by a malware infection. Furthermore, previews_opt_out.db file corruption could be caused from a power outage when loading Comodo Dragon, system crash while loading or saving previews_opt_out.db, bad sectors on your storage media (usually your primary hard drive), or malware infection. Thus, it’s critical to make sure your anti-virus is kept up-to-date and scanning regularly.

How to Fix previews_opt_out.db Errors in 3 Steps (Time to complete: ~5-15 minutes)

If you're encountering one of the error messages above, follow these troubleshooting steps to resolve your previews_opt_out.db issue. These troubleshooting steps are listed in the recommended order of execution.

To begin System Restore (Windows XP, Vista, 7, 8, and 10):

1. Hit the Windows Start button
2. When you see the search box, type "System Restore" and press "ENTER".
3. In the search results, find and click System Restore.
4. Please enter the administrator password (if applicable / prompted).
5. Follow the steps in the System Restore Wizard to choose a relevant restore point.
6. Restore your computer to that backup image.

If the Step 1 fails to resolve the previews_opt_out.db error, please proceed to the Step 2 below.

You can uninstall Comodo Dragon software by following these instructions (Windows XP, Vista, 7, 8, and 10):

1. Hit the Windows Start button
2. In the search box, type "Uninstall" and press "ENTER".
3. In the search results, find and click "Add or Remove Programs"
4. Find the entry for Comodo Dragon 74.0.3729.157 and click "Uninstall"
5. Follow the prompts for uninstallation.

After the software has been fully uninstalled, restart your PC and reinstall Comodo Dragon software.

If this Step 2 fails as well, please proceed to the Step 3 below.

Comodo Dragon 74.0.3729.157

Comodo Group

When the first two steps haven't solved your issue, it might be a good idea to run Windows Update. Many previews_opt_out.db error messages that are encountered can be contributed to an outdated Windows Operating System. To run Windows Update, please follow these easy steps:

1. Hit the Windows Start button
2. In the search box, type "Update" and press "ENTER".
3. In the Windows Update dialog box, click "Check for Updates" (or similar button depending on your Windows version)
4. If updates are available for download, click "Install Updates".
5. After the update is completed, restart your PC.

If Windows Update failed to resolve the previews_opt_out.db error message, please proceed to next step. Please note that this final step is recommended for advanced PC users only.

If Those Steps Fail: Download and Replace Your previews_opt_out.db File (Caution: Advanced)

If none of the previous three troubleshooting steps have resolved your issue, you can try a more aggressive approach (Note: Not recommended for amateur PC users) by downloading and replacing your appropriate previews_opt_out.db file version. We maintain a comprehensive database of 100% malware-free previews_opt_out.db files for every applicable version of Comodo Dragon. Please follow the steps below to download and properly replace you file:

1. Locate your Windows operating system version in the list of below "Download previews_opt_out.db Files".
2. Click the appropriate "Download Now" button and download your Windows file version.
3. Copy this file to the appropriate Comodo Dragon folder location:
   
   Windows 10: C:\Users\Tester\AppData\Local\Comodo\Dragon\User Data\Default\
   Windows 10: C:\Users\Tester\AppData\Local\Google\Chrome\User Data\Default\
   Windows 10: C:\Users\Tester\AppData\Local\Google\Chrome Beta\User Data\Default\
   Windows 10: C:\Users\Tester\AppData\Local\Google\Chrome\User Data\Default\
   Windows 10: C:\GoogleChromePortable\Data\profile\Default\
   
4. Restart your computer.

If this final step has failed and you're still encountering the error, you're only remaining option is to do a clean installation of Windows 10.

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