One of the most difficult problems to solve with Windows 10/8.1/8/7 is when you see a message indicating that the disk is 100% used and your PC suddenly stops responding or reacts slowly. Although there may be many reasons, it is usually caused when the disk usage is at 100% in the task manager.
100% disk usage in Task Manager
Is the problem a known bug in Windows 10? We cannot know exactly why. Why didn’t the same problem occur on computers when people were using Windows 7? Some people report the problem only after upgrading to Windows 10.