how to launch a document

I'd like to have a document that describes my portable apps - lets say called "helpfile" - launch directly from the platform in the same way that apps do.
At present I have an html document in "documents" - but it requires a lot of actions;
in platform "documents" - opens explorer to documents folder - find the right document - double click - opens in edge.
Ideally I want a single click "help" to open the document - such as in a pop-up box.

Considered stickies etc but I dont want anything staying resident, nor a word processor / notepad etc that has lots of functions - just a simple text message to the screen.

Any ideas?