I think windows 10 is not good at all. Windows 8.1 is stable for now. I used Windows 8/8.1 and 10 for over 2 months each. I can see that windows 10 is full of errors or bugs. I've been with windows since windows 95. I know how to program things very well.
At this moment, windows 7 is very stable and should be used till Microsoft creates a new windows with less bugs and errors.
While using windows 7 and 8 and above, i saw that from windows 8, Microsoft has integrated a self defragment system which does not let windows get tired. When I use windows 7 for 2-5 hours, I can see it does slow down but once you do the defragment it then gets faster. From windows 8 and above, windows is staying fast all the time.
Windows 8 and above are more for screen touch computers. I see no reason why Microsoft has integrated all the rubbish softwares in the windows. They should build a clean windows that is free from these meaningless interface or the softwares like weather maps etc. Users should be able to install them IF they need them.
As for windows 10, I tried it on my desktop pc and then on my laptop. Both are under 8 months old and can fully support windows 10. For some strange reasons, even with SSD, the system is not as fast as with windows 8.1 or windows 7.
Windows 10 will never be good because microsoft is wrong to think to make one windows for all, tablets, desktop and phones. Wont work.
Right now, windows 7 and 8.1 is the way to stay. If anyone likes to face unknown issues, use windows 10 or 8.