VDF File Extension

What is VDF file?

VDF is a file format used by a Windows antivirus software.

Contents of VDF files

Files with VDF extension store virus definitions used by AntiVir software and are automatically downloaded during update. VDF files contain signatures of know virus programs in a safe format that are necessary to for the antivirus software to protect the system. AntiVir scans the computer for malicious code described in VDF files. It is worth noting that many new malicious software programs, worms or viruses are developed each day. For AntiVir to be effective in protecting from such threats, its database should be updated at least once a day.

Programs which support VDF file extension

Below is a table that list programs that support VDF files. VDF files can be encountered on all system platforms, including mobile, yet there is no guarantee each will properly support such files.

Updated: 10/30/2023

How to open file with VDF extension?

There can be multiple causes why you have problems with opening VDF files on given system. What is important, all common issues related to files with VDF extension can be resolved by the users themselves. The process is quick and doesn’t involve an IT expert. The list below will guide you through the process of addressing the encountered problem.

Step 1. Download and install Avira AntiVir Premium

The main and most frequent cause precluding users form opening VDF files is that no program that can handle VDF files is installed on user’s system. The solution to this problem is very simple. Download Avira AntiVir Premium and install it on your device. Above you will find a complete listing of programs that support VDF files, classified according to system platforms for which they are available. One of the most risk-free method of downloading software is using links provided by official distributors. Visit Avira AntiVir Premium website and download the installer.

Step 2. Check the version of Avira AntiVir Premium and update if needed

If the problems with opening VDF files still occur even after installing Avira AntiVir Premium, it is possible that you have an outdated version of the software. Check the developer’s website whether a newer version of Avira AntiVir Premium is available. Sometimes software developers introduce new formats in place of that already supports along with newer versions of their applications. If you have an older version of Avira AntiVir Premium installed, it may not support VDF format. The latest version of Avira AntiVir Premium should support all file formats that where compatible with older versions of the software.

Step 3. Assign Avira AntiVir Premium to VDF files

After installing Avira AntiVir Premium (the most recent version) make sure that it is set as the default application to open VDF files. The process of associating file formats with default application may differ in details depending on platform, but the basic procedure is very similar.

The procedure to change the default program in Windows

• Clicking the VDF with right mouse button will bring a menu from which you should select the Open with option
• Click Choose another app and then select More apps option
• To finalize the process, select Look for another app on this PC entry and using the file explorer select the Avira AntiVir Premium installation folder. Confirm by checking Always use this app to open VDF files box and clicking OK button.

The procedure to change the default program in Mac OS

• From the drop-down menu, accessed by clicking the file with VDF extension, select Information
• Open the Open with section by clicking its name
• From the list choose the appropriate program and confirm by clicking Change for all....
• A message window should appear informing that This change will be applied to all files with VDF extension. By clicking Continue you confirm your selection.

Step 4. Check the VDF for errors

You closely followed the steps listed in points 1-3, but the problem is still present? You should check whether the file is a proper VDF file. It is probable that the file is corrupted and thus cannot be accessed.

1. Check the VDF file for viruses or malware

If the VDF is indeed infected, it is possible that the malware is blocking it from opening. It is advised to scan the system for viruses and malware as soon as possible or use an online antivirus scanner. If the scanner detected that the VDF file is unsafe, proceed as instructed by the antivirus program to neutralize the threat.

2. Ensure the file with VDF extension is complete and error-free

Did you receive the VDF file in question from a different person? Ask him/her to send it one more time. The file might have been copied erroneously and the data lost integrity, which precludes from accessing the file. It could happen the the download process of file with VDF extension was interrupted and the file data is defective. Download the file again from the same source.

3. Verify whether your account has administrative rights

There is a possibility that the file in question can only be accessed by users with sufficient system privileges. Log in using an administrative account and see If this solves the problem.

4. Make sure that the system has sufficient resources to run Avira AntiVir Premium

If the system is under havy load, it may not be able to handle the program that you use to open files with VDF extension. In this case close the other applications.

5. Ensure that you have the latest drivers and system updates and patches installed

Regularly updated system, drivers, and programs keep your computer secure. This may also prevent problems with AntiVir Virus Definition files. Outdated drivers or software may have caused the inability to use a peripheral device needed to handle VDF files.

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