.IVD File Extension
File TypeBitdefender Incremental Virus Definitions File
What is an IVD file?
File used by Bitdefender antivirus and Internet protection software; saves virus definition updates which help the software recognize the most recent viruses; used for supplementing the base .CVD virus definitions file with new updates.
Periodically the definitions in the base CVD file are updated. When this occurs, the IVD definitions are reset but may then be updated again with the most recent virus definitions until the next CVD refresh.