Final Step, revoking other's permissions and hiding your library and account

type the e-mail of the microsoft account

(you need to relocate the folder in the steam library folders settings too).

Right click on your steam library folder in yourhard drive and choose properties, select "security" and "advanced", select "change permissions" if needed, disable inherited permissions and remove them. Now click on Add and(your own) you want to give the permissions to, check all the permissions and choose allow (default setting), now repeat the step and add the other microsoft account e-mails, this time choose revoke on the drop down menu and check again all the boxes.Now that you're gone through all this ♥♥♥♥, your games and profile are safe from prying eyes. You can play your games without anyone knowing you even own a secret Steam account or a secret library. If you want to browse your drive, you can locate the VHD file and open it on the disk management window. It appears this must be done each time you boot your PC to let Windows and Steam detect the virtual hard drivesI guess a shortcut can be made with a .bat file or something to execute on boot up, but frankly I haven't got the slightest idea on how to do it.