how to fix 100% disk usage on windows 10if you're reading this article, then you probably have a 100% disk usage on windows 10. It's a pretty common issue that plagues pc users who aren't tech savvy. Unfortunately, the problem is usually pretty tough to fix. You might have a virus or spyware that is causing the issue, but that's unlikely. What's more likely is that you've got a lot of temporary files or programs running on your computer. This can often cause a disk full error, and that's why you're seeing a 100% disk usage on windows 10.