The issue of 100% of Windows 10 disk usage can be solved by optimizing system services and settings. 1. Turn off the "Windows Search" service to reduce disk read and write; 2. Disable the "Superfetch(SysMain)" service to increase the hard disk load; 3. Modify the registry key "DisablePagingExecutive" to reduce frequent hard disk reading; 4. Use the Task Manager to troubleshoot abnormal processes and perform virus scanning; 5. Upgrade the hardware or adjust the hard disk mode such as turning on AHCI or replacing the solid state hard disk. The above methods gradually deepen from software optimization to hardware upgrades, which can effectively alleviate or solve the problem of high disk occupation.

100% disk usage problems in Windows 10 are actually quite common, especially on computers using mechanical hard disks, which will cause system lag and slow response. This problem does not necessarily mean that the hardware is broken, it is often a problem of system optimization or background service. It is not complicated to solve, and the following directions can be checked one by one.

Check the "Windows Search" index service

This feature was originally intended to enable you to search for files faster, but it sometimes frantically reads and writes the disk, causing the occupancy rate to soar to 100%. If you don't rely too much on quick search, you can turn it off directly.

• Open Task Manager, find the Windows Search process to see if it is running at high load
• Press Win R, enter services.msc , and find the "Windows Search (WSearch)" service
• Right-click to select "Properties", change the startup type to "Disable", and then stop the service

Note: Closed will affect the search speed of the Start menu and Explorer, but will not affect your normal use of files.

Update or close the "Superfetch" service

Superfetch (also known as SysMain) was originally used to speed up the startup of the program, but in some cases it will keep the hard disk full.

• Also open the "Services" interface (services.msc) and find the "SysMain" service.
• Right-click, select "Properties", change the startup type to "Disable" and stop the service

Some users reported that the system became smoother after disabling, especially machines using old hard drives. If you are using SSD, the impact may not be great, but you can also try it.

Clean up unnecessary read-preview and cache settings in the background (via the registry)

This method is a little technical, but the operation is not complicated. It mainly changes a registry key called "DisablePagingExecutive":

• Press Win R and enter regedit to enter
• Enter the path: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management
• Find "DisablePagingExecutive" on the right, and if not, create a new DWORD value
• Set its value to 1

This setting allows the system to keep the core driver in memory and reduce frequent reading from the hard disk. It is recommended to back up the registry before the change.

Check for viruses or abnormal processes

Sometimes third-party software or malicious programs can secretly occupy a large amount of disk resources. You can check this way:

• Open Task Manager → "Performance" tab → Check which process is continuously reading and writing to the hard disk
• If you find an unfamiliar process, right-click → open the file location and see what program it is
• Use antivirus software (such as Windows Defender) to perform a full scan

Especially if this problem occurs after installing certain download tools, video players or cracking software, you should pay special attention.

Upgrade hardware or replace hard disk mode (advanced)

If you have tried all the above methods but still can't work, it may be that your hard drive itself cannot keep up with the performance. for example:

• Use an old SATA interface mechanical hard drive → Consider changing to a solid state hard drive
• The hard disk mode in the BIOS settings is not AHCI → Turn on AHCI to improve transmission efficiency
• System disk space is almost full → Clean the system cache or expand the partition

These operations involve system reinstallation or hardware changes, and are suitable for users with certain hands-on capabilities.

Basically these common methods. Some are temporary relief, while others can completely solve the problem. Start with a simple one and then gradually deepen. When encountering uncertainties, don’t change the key settings randomly and check the specific models and configurations more.

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