I've been playing around with Virtualbox and after installing Dos and Windows 3.11, had a try at the mouse tutorial. It's actually a very good & intuitive tutorial. In the screenshot I will try to upload it shows dragging things such as the maximise button back to its right place and so on. I came from an Amiga 500 to Windows 3.11 so I didn't need this back in the day! I'd say that Microsoft put a heck of a lot of effort into those Win 3.x tutorials as it was so important to get it right.
All I can say it is very easy to waste a lot of time with Virtualbox as it's a lot of fun.