I put Win 10 in on my 8.1 machine and 2 days later reverted back to 8.1. Nothing wanted to work, programs couldn't use the drivers with 10 and I was constantly rebooting the machine to get even the Internet to work.
I have another laptop I gave the wife with Win 7 on it. I wouldn't dare confuse her with 10 if I was having trouble with it. I really miss XP. Going to 7 was a step up, but then when my XP tower gave up the ghost, I bought this high end HP with Win 8.1 and love it.
There are those that love it, but the really educated geeks tell you to stay away, that 10 is the spyware version of Windows and nothing at all will be private with it. Not that I feel it really is now, but that's me.
Use Malware Bytes (free) instead of Spybot S&D. It found so much on my old XP machine that nothing else would. And I use Avast also. I love it, many hate it. I also use Super Anti-Spyware to clean up the garbage.