Your antivirus software - Windows Defender - sends automatic definition updates as part of your Windows updates. If you get notified that you have updates, you should always choose to run any essential Windows updates if you are prompted.
You can always check to make sure that your updates are up-to-date1.
Updates can be downloaded to your system manually or automatically from Comodo's update servers.
To manually check for the latest virus Database and then download the updates A dialog box appears, showing you the progress of update process.
Antivirus applications are installed by computer users to detect and remove malware data, including viruses, trojans, worms et c In order to keep antivirus programs up-to-date with the latest threats, without continuously updating the antivirus package, security companies use virus definitions (also known as virus database, update or pattern).
Virus definitions are not stand-alone packages: their purpose is to update an antivirus already present on the user’s computer.
Depending on the security company's policy, virus definitions are updated hourly, daily or weekly.
The following update works for Bitdefender Total Security, Bitdefender Internet Security, and Bitdefender Antivirus.
If a client is not receiving updates automatically, follow this process.
" to download and install virus definition updates without Automatic Update.
This document explains how to update Symantec Endpoint Protection definitions by running Live Update.