All I really need is a basic text box with a scroll bar, and a way to feed it with bytes from a file.
To make it a well-defined challenge: the task is to find a way to create a basic notepad - a multi-line textbox that supports scrolling, and can be fed bytes from a file to render as text directly. Additionally, this must be achievable through simple means - simple enough to memorize - and must work on standard Windows 11 installation, with no extra dependencies to procure. Solution can be e.g. something I can type from memory into "Run" (Win+R) box, but could also be a short list of GUI steps (e.g. open some program, click on "Help", drag file to help box).