Update AVIRA Desktop for Windows with latest virus definitions and scan engine. 1: Download the latest virus definition file (IVDF) on a PC with internet access. 2: Copy the downloaded file to a portable media storage such as an USB Stick or a CD-ROM for transferring it to the PC without internet access. Note: Extracting of the ZIP file is not necessary. 3: Insert the media storage into the PC without internet access. 4: Start AntiVir Personal Edition Classic / Premium and go the menu \\\'Update\\\' and select \\\'Manual Update\\\'. 5: Select the downloaded IVDF file from your media storage and click \\\'open\\\'. Your AntiVir PersonalEdition Classic / Premium is now up to date.