Some antivirus programs (especially Avast, AVG, and McAfee) falsely flag Lumion as a threat and modify hosts entries as “protection.” Temporarily disable real-time protection during installation, then add Lumion’s entire folder to the exclusion list.
scan-hosts --patch --backup /path/to/hosts.backup.2026-04-09T14-32-00 lumion 2023 host file entries detected patched
Add the main Lumion 2023 executable file ( Lumion.exe ) to your trusted exclusion list. Restart your computer. Best Practices for a Clean Installation Some antivirus programs (especially Avast, AVG, and McAfee)