A slow-running computer often bogs because Windows commits significant system resources into disk read and write operations. When you open Task Manager and see 100% disk usage, stopping the process that's forcing that use brings Windows back to normal working order.
Many of the following fixes for 100% disk usage in Windows 10 are relevant to Windows 10, 8, 7, and Vista. However, some commands and system settings may vary.
Causes of High Disk Usage on Windows 10
There are several potential causes for high disk usage in Windows 10, but most come down to the same basic idea: Too many things are running for the computer to handle.
One common cause is swapping or paging. Swapping occurs when a computer runs out of physical memory (RAM) and needs more space to store information about the running processes and applications. It uses a file on the hard drive called swapfile.sys to hold it. As Windows works with that information, it constantly reads and writes to swapfile.sys, driving up disk usage. Download File PDF
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