How to fix 100% Disk Usage on Windows 10, 8 & 8.1 OS.

I have seen the hard disk 100% Usage issue on several Windows 10 and Windows 8 & 8.1 systems and I have applied several different solutions to fix the issue. In some cases the high activity in the hard disk, was caused after a virus attack, in other cases caused from a problematic service (e.g. the Windows Update service) or – more often in Windows 10 systems – was caused from Windows Notifications about tips and apps.

100% disk usage windows 10 fix


In this tutorial you can find several methods to fix the 100% disk utilization issue in Windows 8, 8.1 & 10 based computers.


How to resolve the hard disk high usage 100% issue.



Method 1. Scan your computer for viruses.

Important: Many viruses or malicious programs can cause your Hard disk to work at 100%. So, before you continue to troubleshoot the hard disk’s 100% usage issue, use this Malware Scan and Removal Guide to check and remove viruses or/and malicious programs that may be running on your computer.


Method 2: Disable Windows notifications.

I have tried this solution several times in Windows 10 systems with successful results, but I haven’t test it in Windows 8 or 8.1 systems.

– To disable notifications on Windows 10. (For Windows 8, 8.1 instructions click here).

1. Click on the Windows flag (Start menu) and open Settings.

windows 10 settings

2. At settings window, select System.

windows 10 system


3. Select Notifications & actions at the left and then set the Show me tips about Windows notifications to OFF.

windows 10 disable notifications


4. Close settings window and check if the HDD 100% usage problem persists. If persists, then try to turn off all other notifications.

– To disable notifications on Windows 8 & 8.1.

1. Press Windows image_thumb8_thumb + C keys simultaneously.

2. Select Settings and then click Change PC Settings.

3. On the left click Search and Apps and then select Notifications.

4. Set the Show app Notifications to OFF

windows 8 disable notifications


Method 3. Locate & Terminate the process which causes the high hard disk usage.

In this method I ‘ll show to you, how you can find and terminate the process that makes your disk to work at 100%.

1. Right click on Start menu image and select Task Manager.

2. Click the More details option if the Task Manager is in default (simple) view.

3. At Performance tab click Open Resource Monitor.

hard disk 100% windows 10


4. At Resource monitor select the Disk tab.

fix hard disk 100% activity windows 10


5. Now put the two open Windows {Resource Monitor: Disk & Task Manager: Performance}, side by side on your screen. as in the screenshot below.

fix 100% hard disk usage windows 10


6. At the Resource Monitor window, right click on the first listed process and select Suspend Process.

suspend process in windows 10 and windows 8


7. After you have suspended the process, wait a few seconds (e.g. 10 sec) and then look if the Disk utilization percentage at the other open window has dropped down (Task Manager: Performance).

disk utilization 100%


8. If Disk utilization percentage has decreased, then the next step is to troubleshoot the suspended process or to prevent it from running. If the disk usage is not decreased, then suspend the next process on the list, until you find out which one causes your hard disk to work at 100%.

Bellow is a list of services that can cause your system’s CPU, Memory or Hard Disk to work at 100%.:

  1. Windows Update
  2. BITS (Background Intelligent Transfer Service)
  3. Windows Search
  4. Superfetch

Try to disable the above services, one-by-one at a time and then restart your computer, until you find out which of them causes your system components  (Hard Disk, CPU or Memory)  to work at 100%.

Note: To Disable a Windows service:

1. Press Windows image_thumb8_thumb + R keys to open the run command box.

2. In the Search box, type: services.msc  & click OK.


3. Locate at the services list, the service that you want to disable. (e.g. the “Windows Update” service).

4. Right-click on the service and select “Stop”.

stop windows update service


5. Restart your computer.


Method 4. Troubleshoot Windows problems by Running the  Maintenance Tasks.

– On this method you can learn how to Troubleshoot several problems on your computer in order to decrease the usage of your hard disk.

1. Right click to Start menu  image  and select Control Panel.

2. Open Troubleshooting.

* If you don’t see the Troubleshooting option, set the View (View by) to Small icons.

3. Under System and Security select Run Maintenance Tasks.

run maintenance in windows 10 & Windows 8


3. Press Next and then wait until the System Maintenance utility detecting problems.

4. Follow the on screen instructions to fix the problems found.


Method 5. Rebuild Index.

– Another solution to resolve the 100% high usage issue on your hard disk, CPU or Memory is to rebuild the Index.

1. Navigate to Windows Control Panel and open Indexing Options.*

* If you don’t see the Indexing Options, set the View (View by) to Small icons.

2. At Indexing Options click Modify.

3. Uncheck Offline Files* and press OK.

4. Then click Advanced.

5. At Troubleshooting section, click the Rebuild button.

index rebuild

6. Press OK to rebuild the Index.

7. Wait until the index rebuilding is completed and then restart your computer.

That’s all! Did it work for you?

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