Virus signature updates. Installation Steps to follow: Download the weekly_cumulative.exe or the weekly_cumulative.zip to update your signatures up to last week's number. Download the daily.zip. How to use the daily.zip and the weekly_cumulative.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:\program files\softwin\BDHome). Restart your BitDefender modules (or reboot your system) in order to finish the upgrade process. How to use the weekly_cumulative.exe: Save the file to a location on the disk. Run the file in order to update your product's signatures. Note: If you are using the daily.zip on a regular bases you don't have to use the cumulative updates.