Whether you are a home user trying to fix a friend's virus-ridden laptop that cannot connect to Wi-Fi, or an IT admin managing a fleet of 50 computers, the offline installer is your most reliable tool.
The installer will scan your system. Because this is an offline package, it will not attempt to download additional components. You will see a progress bar filling up quickly (copying local files). kaspersky offline installer
The installer hangs at 80% extraction. Solution: This often happens due to permissions conflicts or antivirus interference (ironic, I know). Disable Windows Defender completely (Settings > Privacy & Security > Windows Security > Virus & threat protection > Manage settings). Run the installer again. Whether you are a home user trying to