I’ve used a few programs to set up ESP8266 boards – mostly requiring you install something special – but this is the most polished to date (but not the fastest. Here’s the link – grab the ZIP file and in my case the 64-bit EXE worked- some will need the 32-bit version – both in there. No setup, nothing – just runs. You tell it the port you are after – in the config area you tell it which file or files you need…and it does a nice job of blowing the file into your ESP-01 or whatever board you are using. I THINK it is slower than ESP-FLASHER – but the latter chucks out a load of un-necessary and confusing stuff including things it can’t find. This is a nicer experience.