Before you install Lubuntu, you need to retrieve the correct image. Lubuntu supports AMD64 CPU types also known as 64-bit with a new version every six months (supported for nine months), and every two years being a long term support release (supported for three years). If you have a 32 bit processor we unfortunately had to drop support but 18.04 LTS is still supported until 2021 for 32 bit. Lubuntu 20.04 is a Long Term Support release supported until 2023. Lubuntu 21.04 is supported until Januaray 2022.
Before you install Lubuntu, you need to retrieve the correct image. Lubuntu supports AMD64 CPU types also known as 64-bit with a new version every six months (supported for nine months), and every two years being a long term support release (supported for three years). Lubuntu 20.04 is a Long Term Support release supported until 2023. Lubuntu 21.04 is supported until Januaray 2022.