I own two windows 10 laptops and they both have this problem.
On one of them, which is my personal laptop, I have tried every solution I can find online, spending 5 or 6 hours total trying to fix it with absolutely no impact.
The other one is a new laptop I use solely for work. This was fine for a month or two, but after a recent update is showing 100% disk usage even when the machine is completely idle. It makes the computer incredibly sluggish / non-responsive and is a massive impact on my productivity. I haven't tried any of the proposed solutions on this machine since apparently it is a complete crapshoot as to whether they have any impact, and they involve messing around with things that shouldn't need messing with. What should I do, buy another computer? Based on my experience it is highly likely that this will have the same problem.
I am afraid I don't have any useful advice for people who are suffering from this problem, but I just wanted to express my frustration. Windows 10 is a broken OS that should never have been released.
Fix this problem, Microsoft!