TecMint published a tutorial about installing Linux Mint 20 alongside Windows 10 or 8 in dual-boot UEFI mode.

How to Install Linux Mint 20 Alongside Windows 10 or 8 in Dual-Boot UEFI Mode

Linux Mint 20 has been released in wild by the Linux Mint project development team as a new long term support edition which will receive support and security updates until 2025.

How to Install Linux Mint 20 Alongside Windows 10 or 8 in Dual-Boot UEFI Mode