Signature file updates ensure that your PC is protected from the latest viruses. It is very important to make sure that you have the latest signature on your PC.As new threats emerge, Symantec immediately builds new Virus Definitions Updates and makes them available for download.Note: The i32 Intelligent Updater package cannot be used to update Symantec AntiVirus Corporate Edition 8.0, 9.0, or 10.0 servers or Norton AntiVirus Corporate Edition 7.6 servers, but can be used to update Corporate Edition clients. The x86 Intelligent Updater package can be used to update Corporate Edition clients and servers.