The EASIEST way...use a local account from the get-go and not get into the Onedrive trap..
100% this. No Microsoft account, they cannot force the machine to use OneDrive - which requires a Microsoft account login.
I use a local login for Windows even though I actually *do* use OneDrive to save folders I want to backup. In fact, I use what resident guru
@Kari calls a
hybrid setup, where I use the local login, but then after setup, add my Microsoft account to the system - and manually set up everything, including OneDrive.
For the Desktop folder with OneDrive enabled during setup, you'll need to open the OneDrive folder, then see if it is there. It should be *somewhere* under OneDrive.
Once you find it, pin the folder to the nav bar and it will start showing up in most apps when you go to save files and such.
If you don't want to cleanly install yet again, follow the two posts you plan to spend time researching from
@glasskuter and
@Ghot - and check out the list of tutorials that
@antspants posted earlier that he uses to 'attack' Windows Explorer.
However, after doing a good bit of research, I think you will be well served with arming yourself with the knowledge on how to perform a clean install with local login only, and perform one final clean install, - because it is a lot easier if you keep control of the installation process (and thus the ubiquitous automatic folder mapping and backups) when setting up OneDrive specifically.