I found W8 and W8.1 to be a disaster on tablets. I can't guess what Microsoft was thinking recycling code and DIALOG BOXES from their desktop OS. I had a devil of a time pairing up Bluetooth as the dialog box as not appropriate for my 7 inch Toshiba W8.1 tablet.
Windows 10 looks a little better as they update some but not all dialog boxes.
Frankly Microsoft has a long way to go to get my nod for Windows on tablets.
I just purchased a Tablet with Windows 8.1 installed. It's asking me to upgrade to Windows 10. Is there any advantage or disadvantage to upgrading to Windows 10?