Try going to,
Add / Remove Programs > Set Program Access and Defaults > Custom and select OE (hopefully it will be there)
The reason that the browser windows open is that Hotmail is set as the Default Client. Hotmail is webmail and so the computer tries to open www. hotmail .com. Though its strange that it does it 63 times.
Windows 10 Home vs Windows 10 Pro comparison: Here are the extra features you get in the Pro version