How to Fix 100% Disk Usage on Windows 10?

by Julie Splinters - -
12

Question

Issue: How to Fix 100% Disk Usage on Windows 10?

Hello. I’m having an on-going issue with CPU usage. My laptop is running Windows 10 Anniversary Update. I did a clean install with the bootable media after I noticed this issue and then CPU usage went back to normal. However, when I reinstalled needed apps, the CPU usage shot back to 100% constantly. I went through various forums online and the only thing I’ve found out that there are hundreds of people who are struggling with obscure 100% CPU usage on Windows 10. Do you have any ideas why this may be happening and what should I do to fix this?

Solved Answer

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Indeed, 100% CPU usage on Windows 10 operating system is a well-known issue to Microsoft. According to specialists, this issue is typically triggered by a common software combination of Google Chrome and Skype. These two programs are known for sucking up memory individually, meaning that launching them at the same time might have devastating consequences, such as 100% disk usage, serious slowdowns, freezes, and crashes. If you are not running Skype and Google Chrome simultaneously, it might be that Google Chrome alone is taking up your disk usage alone if a PC is infected by virus or malware. According to Chrome engineers, advanced settings on Google Chrome contain an option called “Protect you and your device from dangerous sites”. If you have this option enabled and the malware inside the system, this may root cause a high disk activity. As a matter of fact, various programs might be influencing system slowdowns and 100% memory usage, including Norton anti-virus, OneDrive, or Background Intelligent Transfer Service. Therefore, it’s very important to troubleshoot the issue and corresponding optimization methods.

How to fix 100% CPU usage on Windows 10?

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If you are using Google Chrome and Skype simultaneously, our recommendation would be to close one of them. Don’t forget that clicking on X button on Skype doesn’t close the application completely as it keeps running in the background. You can find out how to turn off Skype completely in this post.

Furthermore, if your Google Chrome is set to “Protect you and your device from dangerous sites”, try to disable this option and run a scan with a professional anti-virus, for instance, Reimage. Virus, malware, worms, and similar threats are, needless to say, sucking up PC’s resources and generally influencing its performance in a negative way.
It’s worth mentioning that many people have managed to fix 100% disk usage on Windows 10 by unregistering of OneDrive service. Although this solution is not officially proved, there are a number of people who claim this method to stand out its purpose. If these simple steps did not help to optimize 100% CPU usage in Win 10, try the following fixes:

Fix 1. Change Google Chrome and Skype settings

Google Chrome:

  1. Launch Google Chrome and open Settings by clicking on three vertical dots at the top right corner of the screen.
  2. Scroll down and click on Show Advanced Settings.
  3. Select Privacy and untick an option Prefetch resources to load pages more quickly.

Skype:

  1. Close Skype by clicking on the X button.
  2. Then, click an arrow on the taskbar, find Skype icon, right-click on it, and select Quit.
  3. Once done, open Windows Explorer and navigate to C:\Program Files (x86)\Skype\Phone\.
  4. Right-click on Skype.exe and select Properties.
  5. Click on Security tab, select Edit, and highlight ALL APPLICATION PACKAGES.
  6. Place a check mark in the Write box.
  7. Click Apply and OK to save the changes.

Fix 2. Try a Clean Boot

  1. Open search, type System Configuration, and press Enter.
  2. Go to the Services, select Hide all Microsoft services and then Disable all.
  3. Open Startup tab and select Task Manager.
  4. Mark all non-Microsoft applications and click Disable.
  5. Once done, exit Task Manager.
  6. On the System Configuration dialogue box, click OK.
  7. Restart the system.

Check if the memory usage went back to normal. If it did, then you should enable applications one by one to find out which one of them is problematic.

Fix 3. Disable Windows 10 search

  1. Right-click on Win key and select Command Prompt (Admin).
  2. On the UAC window, click OK.
  3. Type net.exe stop “Windows search” command and hit Enter.
  4. After that, check if your Windows 10 CPU usage decreased to the normal level.

Fix 4. Disable Superfetch Service

This service has been suspected as a potential cause of CPU usage issues on earlier Windows versions, so disabling it is worth trying in Windows 10 system, which is encountering a 100% disk usage issue. For that, you should:

  1. Right-click on Win key and select Command Prompt (Admin).
  2. Click OK on the UAC window.
  3. Type net.exe stop superfetch command in the log and press Enter.

Hopefully, you have adjusted some of the above-listed tips and managed to fix 100% disk usage on Windows 10. If none of the methods worked, please let us know so that we could initiate further research towards this issue.

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About the author

Julie Splinters - Computer optimization specialist

When it comes to computer optimization, Julie Splinters is the expert. Whether it is a slow smartphone, Windows, Mac or Linux operating system, she will find a solution within minutes.

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