
It is mainly used for installing or preparing an update on Windows 10. This Modern Setup Host (SetupHost.exe) is an installer which is located in the subfolder of C:$Windows.BTSources. Unfortunately, this problematic process is unfamiliar to most of the users, which is also why this post appears to help you with the SetupHost.exe at 100% high disk usage error. Or for some people, if you have just updated Windows 10, you will find the Modern Setup Host stopped working on Windows 10. After restarting for several times, Modern Setup Host usage jumps from 50% to 95% again on your PC.

Sometimes, SetupHost.exe uses 50% or more CPU on Windows 10, which seriously prevents you from running smoothly. How to Fix Modern Setup Host High CPU or Stopped Working Error.

Why Does Modern Setup Host High CPU or Disk Occur to Windows 10?.

While in some situations, high CPU and disk on Modern Setup Host come out even if the upgrade happened a long time ago. In the case where you take notice of Windows 10 slow performance, you will firstly open the Task Manager to check the CPU, memory and Disk usage on your PC, but to find there is a Windows process called Modern Setup Host takes up high CPU or disk holding your PC hostage, especially after Windows 10 update.
