BitDefender Virus Definitions

It's needless to say how important is to keep your Bitdefender (and not only) security software up-to-date. Having the latest virus definitions installed enables you to make sure your antivirus recognizes the latest threats, blocks their actions and sends them to the quarantine before the system is compromised.

The ever-growing number and the complex nature of threats make Bitdefender and other security companies release virus signatures almost daily. Aside from virus signatures, these include spam signatures, which add new filters and rules for the antispam engine in Bitdefender products.

The virus signatures are normally downloaded and installed automatically by the Bitdefender product you own. It is recommended that you allow your Bitdefender product to automatically scan for new definitions and update its database silently. However, manual update is also possible. Nevertheless, there might be situations when your computer gets disconnected from the Internet, and the automatic download is not possible anymore. In this case, you can use the latest BitDefender Virus Definitions package to make sure the virus signatures are up-to-date.

To install the virus definitions, you must download the package that matches your operating system's architecture (x86 or x64), while also making sure you are grabbing the correct edition. The definitions installer must be transfered to the offline computer using any portable storage media and launched just like a regular application. After hitting a few 'Next' buttons in the setup wizard, your Bitdefender product will have all the latest definitions installed.

There are definition packages for various editions of Bitdefender products, from the latest (2016 / 2015) going back to version 7, almost each with dedicated x86 and x64 setup files.

Regardless of the edition you own, you should know that the BitDefender Virus Definition packages should work with Bitdefender Antivirus Plus, Bitdefender Internet Security, and Bitdefender Total Security.