Websites like Newegg, Amazon, or SoftwareKeep sometimes sell "multi-device, multi-year" packs. Look for listings that mention "3-Year + 3-Year Extension" or "10-Year Total Protection." Contact customer support to confirm the final expiration date before purchase.
Sometimes, legitimate corporate keys intended for large enterprise deployments are leaked online. While these may technically work until the license expiration date set in the management console: avg license key till 2038
Some IT administrators have access to 10,000+ day trial keys for AVG Business Edition. These are strictly for internal testing. Using them for personal devices violates licensing agreements, but they technically expire around 2038. Websites like Newegg, Amazon, or SoftwareKeep sometimes sell