Seriously, there is no need to worry. If you are upgrading from 7/8 to 10 the upgrade process works flawlessly. In my case apart from the joystick problems, which were caused by me, everything else was exactly where I left it and all the software was also working as before. A backup is a sensible precaution regardless but you won't need it. The worst that might happen is that you need to remap your controllers axes/buttons but that's a five minute job to sort anyway.
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