What are DefBit.db Error Messages?

General DefBit.db Runtime Errors

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

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

Most DB errors are due to missing or corrupt files. Your DefBit.db file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with Advanced SystemCare Ultimate), or deleted by a malware infection. Furthermore, DefBit.db file corruption could be caused from a power outage when loading Advanced SystemCare Ultimate, system crash while loading or saving DefBit.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 DefBit.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 DefBit.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 DefBit.db error, please proceed to the Step 2 below.

You can uninstall Advanced SystemCare Ultimate 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 Advanced SystemCare Ultimate 12.1.0.120 and click "Uninstall"
5. Follow the prompts for uninstallation.

After the software has been fully uninstalled, restart your PC and reinstall Advanced SystemCare Ultimate software.

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

Advanced SystemCare Ultimate 12.1.0.120

IObit

When the first two steps haven't solved your issue, it might be a good idea to run Windows Update. Many DefBit.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 DefBit.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 DefBit.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 DefBit.db file version. We maintain a comprehensive database of 100% malware-free DefBit.db files for every applicable version of Advanced SystemCare Ultimate. 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 DefBit.db Files".
2. Click the appropriate "Download Now" button and download your Windows file version.
3. Copy this file to the appropriate Advanced SystemCare Ultimate folder location:
   
   Windows 10: C:\Program Files (x86)\IObit\IObit Malware Fighter\
   Windows 10: C:\Program Files (x86)\IObit\Advanced SystemCare Ultimate\
   
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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