Bitdefender officially discontinued support for Windows XP in . While the modern Bitdefender Antivirus Free is a powerful, lightweight tool for current operating systems, it is not compatible with Windows XP.
The current version of Bitdefender Antivirus Free requires at least or higher. In March 2022, Bitdefender replaced its old free edition with a "re-engineered" version built on a modern technology platform that lacks the drivers and architecture needed to run on XP's NT 5.1 kernel. 2. Status of Legacy Bitdefender on XP bitdefender free xp
The phrase likely refers to Bitdefender Antivirus Free Edition running on Windows XP . lightweight tool for current operating systems