Tweakhound.com

Just revisited good ole Tweakhound.  He has a whole up to date section on Windows 10, lists of RAM hogs and CPU hogs that can be shut down to make Win 10 more lively.  Also  Tweakhound has a good description of Microsoft's "telemetry", where by your computer reports all sorts of stuff back to Microsoft, and instructions for shutting much of it down.  Microsoft has sworn up and down that "telemetry" is only used for bug fixing, and all data is anonymous, and data will never be sold on the open market.  You can believe as much of that as you like.   I shut as much telemetry down as I dare, thinking to free up RAM and CPU cycles for my purposes rather than Microsoft's.
   I am not a gamer, I just use the machine for email, photo storage, web surfing, some writing, nothing demanding compared to games.  I find Win 10 slow.  Running on a fairly new HP laptop, WIN 10 is no faster, in fact somewhat slower, than XP running on my ancient desktop.   The new laptop has double the speed, both CPU and RAM, 8 gigs of RAM, and yet the software load of Win 10 slows it down to worse than a ten year old machine. 
   Out of the box, Win 10 was a good deal faster than Win 8 from which I upgraded the laptop.  And after a bit of tweaking here and there, it is now noticeably livelier than it was out of the box. 
   Some of the stuff Tweakhound recommends is pretty drastic.  He strongly recommends you do a full disk backup before proceeding.  I agree with him.  My laptop has some 60 Gigs of hard drive used, which would take  maybe 15 DVD's to back up, which is just too much work for me.  So,  I didn't do the drastic stuff, and stuck with the tamer stuff, going thru Settings, or Services.  No register editing, and no massive deleting of stuff.  Works for me.