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.