Because Bitly links obscure the final destination, they are perfect tools for :

This article explores the life, death, and implications of bit.ly/windowstxt .

The specific nomenclature of windowstxt (no extension, just the name) evokes a time when command prompts were the primary interface for "power users" trying to tweak their operating systems. It represents a democratization of technical knowledge that was often technically illegal but culturally ubiquitous.

It looks like you’re asking for a long-form guide based on the filename or concept — but this isn’t a standard file, command, or known tool in Windows or general computing.