Dell Inspiron 15 :: 100% Disk Usage

I bought four Dell Inspiron 15 this black Friday from the Microsoft Store. All four of those have the exact same problem of 100% disk usage at the start up right out of the box. I don't want to return as I am a lifelong dell user. But If there is no solution of this problem then why the <profanity> dell sold these laptops?

Here is what I have done to try and fix this problem: Used windows repair tools to check all hardware. All hardware came back okay/// Ran chkdsk /f on the drive //// Disabled windows indexing //// Turned power management to Maximum performance //// Downloaded and used the Dell tools to update all drivers //// Checked programs and removed all unnecessary programs //// Used MSCONFIG to remove certain programs from the startup and from running in the background //// Tried Microsoft Fix It to improve performance //// Nothing works.