This is what Rushes stated:
Press the R on your keyboard a few times until Holmes is in third person and you have a pipe as your cursor. Then click an area onscreen and Holmes will move to it. That should cancel out the navigation box and move you on to the next point. You do need to follow the tutorial instructions that appear.
I will move you to Hints forum, Barry.
See if all those manipulations get you off the tutorial (if you finished it completely) and the inset disappears. Keep us posted.
If I understand you correctly, the tutorial is just asking you to walk? Has it asked other things like pick up or examine?
If so - then you have not walked around yet; if you do that correctly another action will be asked.