Hi what build are you on? The latest build is 14393.447. There are many reasons why a PC slows down and freezes. Here's just a few. You could try a in-place repair!
If you need more help, please join the forum. I will be logging on and off all day! https://answers.microsoft.com/en-us...ely-slow/d3f06f4b-b679-40b6-ad1e-1a0d8775d153
Are you an insider? as it has received a new update to build 14977. If yes then check if all the drivers are updated and if possible reinstall those drivers.