MS windows 10 is very good operating system but it has some drawbacks like windows 8.Because its free upgrade many users update it but suddenly roll-back.it has lots of inbuilt applications which is running in background they causes system slow and lots of bandwidth also.
But Now a days some application can stop background applications and make windows 10 more user-friendly
for more info one can see.
https://omgfix.blogspot.in/2015/10/destroy-windows-10-spying-1.html