SystemDisk.sdf: How to Fix, Download, and Update

Last Updated: 11/25/2023
[Time to Read: ~3-5 minutes]

SQL Server Compact Database files, such as SystemDisk.sdf, are considered a type of Database (SQL Server Compact Database) file. They are associated with the SDF file extension, developed by Avira Operations GmbH & Co. KG. for Avira Free Antivirus 15.0.1909.1591.

The initial introduction of SystemDisk.sdf released in Avira Free Antivirus 15.0.1909.1591 was for Windows 10 on 09/25/2019. According to our records, this release is the only version of this file offered by Avira Operations GmbH & Co. KG..

Continue reading below to discover detailed file information, SDF file troubleshooting, and free downloads of several versions of SystemDisk.sdf.

File Analysis Provided by Jason Geater (Author)


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File Overview


General Information
File Name: SystemDisk.sdf
File Extension: SDF file extension
File Type: Database
Description: SQL Server Compact Database
User Popularity Rating:
 
Developer and Software Information
Software Program: Avira Free Antivirus 15.0.1909.1591
Developer: Avira Operations GmbH & Co. KG.
Software: Avira Free Antivirus
Software Version: 15.0.1909.1591
File Details
File Size (Bytes): 7711
Oldest File Date: 10/02/2019
Latest File Date: 10/02/2019


What are SystemDisk.sdf Error Messages?


General SystemDisk.sdf Runtime Errors

SystemDisk.sdf file errors often occur during the startup phase of Avira Free Antivirus, but can also occur while the program is running. These types SDF errors are also known as “runtime errors” because they occur while Avira Free Antivirus is running. Here are some of the most common SystemDisk.sdf runtime errors:

Microsoft Visual C++ Runtime Library

Runtime Error!

Program: C:\Program Files (x86)\Avira\System Speedup\sdf\SystemDisk.sdf

This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.


Most SDF errors are due to missing or corrupt files. Your SystemDisk.sdf file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with Avira Free Antivirus), or deleted by a malware infection. Furthermore, SystemDisk.sdf file corruption could be caused from a power outage when loading Avira Free Antivirus, system crash while loading or saving SystemDisk.sdf, 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 SystemDisk.sdf 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 SystemDisk.sdf issue. These troubleshooting steps are listed in the recommended order of execution.


Step 1: Restore your PC back to the latest restore point, "snapshot", or backup image before error occurred.

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 SystemDisk.sdf error, please proceed to the Step 2 below.

Step 2: If recently installed Avira Free Antivirus (or related software), uninstall then try reinstalling Avira Free Antivirus software.

You can uninstall Avira Free Antivirus 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 Avira Free Antivirus 15.0.1909.1591 and click "Uninstall"
  5. Follow the prompts for uninstallation.

After the software has been fully uninstalled, restart your PC and reinstall Avira Free Antivirus software.

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

Avira Free Antivirus 15.0.1909.1591

Avira Operations GmbH & Co. KG.

Step 3: Perform a Windows Update.

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


GEEK TIP : We must emphasize that reinstalling Windows will be a very time-consuming and advanced task to resolve SystemDisk.sdf problems. To avoid data loss, you must be sure that you have backed-up all of your important documents, pictures, software installers, and other personal data before beginning the process. If you are not currently backing up your data, you need to do so immediately.



Download SystemDisk.sdf Files (Malware-Tested 100% Clean)


CAUTION : We strongly advise against downloading and copying SystemDisk.sdf to your appropriate Windows system directory. Avira Operations GmbH & Co. KG. typically does not release Avira Free Antivirus SDF files for download because they are bundled together inside of a software installer. The installer's task is to ensure that all correct verifications have been made before installing and placing SystemDisk.sdf and all other SDF files for Avira Free Antivirus. An incorrectly installed SDF file may create system instability and could cause your program or operating system to stop functioning altogether. Proceed with caution.

Windows 10


Files Related to SystemDisk.sdf


SDF Files Related to SystemDisk.sdf

File Name Description Software Program (Version) File Size (bytes) File Location
registry.sdf SQL Server Compact Database Avira Free Antivirus 15.0.1909.1591 124271 C:\Program Files\Microsoft Office 15\root\vfs\P...
Tuning.sdf SQL Server Compact Database Avira Free Antivirus 15.0.1909.1591 162847 C:\Program Files\Common Files\Microsoft Shared\...
DataDisk.sdf SQL Server Compact Database Avira Free Antivirus 15.0.1909.1591 3135 C:\Program Files (x86)\Microsoft Office\root\vf...
BootOptimizer.sdf SQL Server Compact Database Avira Free Antivirus 15.0.1909.1591 686815 C:\Program Files (x86)\Common Files\microsoft s...
PrivacyCleanerDefiniti... SQL Server Compact Database Avira Free Antivirus 15.0.1909.1591 2159 C:\Program Files\Common Files\Microsoft Shared\...

Other Files Related to SystemDisk.sdf

File Name Description Software Program (Version) File Size (bytes) File Location
Sessions.xml Extensible Markup Language Avira Free Antivirus 15.0.1909.1591 5277233 C:\Windows\servicing\Sessions\
CBS.log Log Avira Free Antivirus 15.0.1909.1591 9824010 C:\Windows\Logs\CBS\
setuperr.log Log Avira Free Antivirus 15.0.1909.1591 555 C:\$WINDOWS.~BT\Sources\Panther\
setupact.log Log Avira Free Antivirus 15.0.1909.1591 9909 C:\Windows\System32\Sysprep\Panther\
WmiApRpl.ini Windows Initialization Avira Free Antivirus 15.0.1909.1591 29736 C:\Windows\inf\WmiApRpl\0009\


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