If you are facing IaStorA.sys 100% disk usage on Windows 11/10, then the issue is due to Intel Rapid Storage Technology. Here's the fix!

I'm running a Lenovo Ideapad U530, made in 2014, and I experience sluggish browsing, with File Manager telling me that there's 100% Disk Usage, and with memory usage around 80 - 90%. I usually run ...

Sometimes Diagnostic Policy Service shows 100% Disk,CPU or Memory Usage in Windows 11/10. If you are facing this issue, read this article to get your problem solved.