Use a tool like Rufus or the native MiniTool builder to flash the ISO onto a USB stick (8GB is usually plenty).
Version 10.2 hit the "sweet spot" for many users by offering a clean interface and robust features before the software became more resource-heavy in later updates. minitool partition wizard bootable 102 iso top
To use the bootable version, you cannot simply click an .exe file. You must "burn" the ISO to a USB drive. Use a tool like Rufus or the native