This is for BitDefender 9 products. BitDefender 8 updates can be downloaded here
Bitdefender latest virus definitions

How to use the daily.zip :
- Close all applications and all BitDefender modules.
- Extract the daily.zip contents and place them in the plugins folder located in BitDefender installation folder (default path is c rogram filessoftwinBDHome).
- Restart your BitDefender modules (or reboot your system) in order to finish the upgrade process.

Works with BitDefender Professional Edition, BitDefender Standard Edition, BitDefender Free Edition.

To update BitDefender, please follow these steps:

1. Download the appropriate update;

On Mondays or first time updates using the manual updates please download the cumulative.zip file and save it to your disk when prompted. Otherwise download daily.zip and save it on your disk.

2. Open the computer management console and stop the following services: BitDefender Virus Shield and BitDefender Scan Server.