> > 100 Disk Usage Windows 10

How to Fix: 100% Disk Usage on Windows 10 Task Manager


Summary: Recently, many users report that their disk utilization reaches to 100%, leading to lagging and unresponsive system. Learn how to fix Windows 10 100 percent disk usage problem, in this post.

Recently, more and more Windows 10 users report that they have come across 100 disk usage Windows 10 issue. See a Windows 10 user thread from answers.microsoft.com:

Q: Disk Usage at 100% on Windows 10
When I load into Windows, I could move the mouse, but nothing else was responsive. It took about a minute to open up the start menu when I opened the Task Manager, my disk 1 (C:) is at 100% utilization. Meanwhile, my CPU is at 5% 2.72GHz, and my memory is at 8% 2.6/31.9GB. Anybody can help? After few restarts sometimes it's no more 100% sometimes it's again 100% usage...


How do you know you have 100 disk usage Windows 10? In the Task Manager, under Process and Performance tab, the disk utilization reaches to 100%, leading to lagging and unresponsive system. The system starts freezing until disk usage reduces from 100%. This can be observed in the following screenshot:

disk usage 100

In addition, the system event log contains numerous events with Event ID 129, which represents resets of the disk controller.

Are you troubled by disk usage 100 Windows 10? Next, we will show you the worth-trying ways to address Windows 10 100% disk usage.

recommend You might also be interested in: 3 Ways to Help You Get out of Low Disk Space Warning in Windows 7/8.1/10.

10 Fixes for 100% Disk Usage on Windows 10 Task Manager

Fix 1. Fix Your StorAHCI.sys Driver

According to Microsoft support, Event ID 129, the resets of the disk controller, can be caused by many factors. One of the known ones is some Advanced Host Controller Interface PCI-Express (AHCI PCIe) models cause these symptoms in Windows 10 when running with the inbox StorAHCI.sys driver. Due to a firmware bug, the Solid-state drive (SSD) does not properly complete input/output when Message Signaled Interrupt (MSI) mode is enabled. As a result, the Windows storage stack attempts to reset the device after waiting on unresponsive read/write for a period of time.

So the first solution to fix 100 percent disk usage Windows 10 here is to disable MSI mode via the registry. Follow the guide below:

First Move: Identify if you are running the inbox AHCI driver (StorAHCI.sys)

Step 1. Press "Win+R" to call out the Run box, then type "devmgmt.msc" and hit Enter.

Step 2. Under "IDE ATA/ATAPI Controllers", right-click "Standard SATA AHCI Controller" and select "Properties".


Step 3. Navigate to the "Driver" tab and click "Driver Details". If you see "storahci.sys" in the list, you are running the inbox driver.

driver details

Second Move: Disable MSI for the controller in the registry

Step 1. In the same properties window, navigate to the "Details" tab and select "Device instance path" from the Property drop-down menu. Please pay attention to the Value that starts from PCI\VEN, which will be useful in Step 3.

device instance path

Step 2. Open the registry editor by typing "regedit" in the same Run box.

Step 3. Navigate to "HKEY_LOCAL_MACHINE\System\CurrentControlSet\Enum\PCI\<AHCI Controller>\Device Parameters\Interrupt Management\MessageSignaledInterruptProperties", where <AHCI Controller> refers to the device instance path you noted in Step 1. Then change the value of the MSISupported key from "1" to "0".

change value data

Reboot the machine and see whether this works for your machine.

Fix 2. Change Energy Options from Balanced to High Performance

According to the feedback provided by the suffers, changing energy options from Balanced to High Performance works well on 100 percent disk usage Windows 10. Please do the followings:

Go to Power Options > Change plan settings > Change advanced power settings, choose High performance from the drop-down box and make sure all plan settings are on default. Go and figure!

high performance

Fix 3. Change Settings in Google Chrome and Skype

A lot of users also recommend changing settings in Google Chrome and Skype. For some unknown reasons, a particular combination of Skype and Google Chrome browser settings can cause the 100% disk utilization problem in Windows 10. Here's how to fix those settings:

Step 1. In Google Chrome, go to "Settings".

Step 2. Scroll down to the bottom of the page and click "Advanced".

Step 3. In the "Privacy and security" category, make sure the "Use a prediction service to load pages more quickly" is turned off.

privacy and security

Step 4. Make sure that your Skype is quitted in the taskbar.

Step 5. Open Windows Explorer and open "C:\Program Files (x86)\Skype\Phone\".

Step 6. Right click "Skype.exe" and choose "Properties" from the context menu. Then open the "Security" tab and select "Edit".

edit security

Step 7. Highlight "ALL APPLICATION PACKAGES" and then check the "Write" box. Finally, click "Apply", "OK" and then "OK" again to save changes.

enable write permission

Now check your disk usage in Task Manager to see if this has resolved high disk usage Windows 10.

Fix 4: Disable Windows Search

Windows Search enables to search files on your PC fast. If you don't use it at all, you can disable it completely. Disabling Windows Search service will stop the indexing of all files. However, to identify whether this is the cause of your 100% disk utilization problem, we recommend temporarily disabling Windows Search first.

First Move: Temporarily Disable Windows Search

Note that Windows Search will start again when you restart your computer. So this change has no impact on your computer performance.

Step 1. Press "Win+X" combination keys and select "Command Prompt (Admin)". Then allow its user account control.

Step 2. In the Command Prompt window, type "net.exe stop "Windows search"" and hit the Enter key.

disable windows search temporarily

Check if your disk usage and the performance of your computer improve. If YES, you should permanently disable Windows Search as described below.

Second Move: Permanently Disable Windows Search

Step 1. Press "Win+R" combination keys to call out the Run box, then type "services.msc" and hit Enter.

Step 2. Locate "Windows Search" and double-click it to enter its "Properties" window.

locate windows search

Step 3. Change the Startup type option to "Disabled". Then click "Apply" and "OK" to save your change.

disable startup

Check whether this works for 100 disk usage Windows 10.

Fix 5: Disable SuperFetch Service

SuperFetch helps to decrease boot time and make must-load programs more efficiently. However, it has been identified as a potential cause of high disk usage Windows 10. Here's how to stop this service:

Step 1. Press "Win+X" combination keys, then choose "Command Prompt (Admin)" and allow its user account control.

Step 2. In the Command Prompt window, type "net.exe stop superfetch" and hit the Enter key.

disable windows search permanently

Wait for a few minutes and check if your computer starts performing better.

Fix 6. Disable Antivirus Software

If you've installed some antivirus or anti-malware programs on computer, you can temporarily disable them to see if they're the cause of your 100 percent disk usage problem. If your computer's disk usage returns to normal, you may need to contact the software vendor to see if they can provide some help.

If no improvement is offered by the vendor, you don't need to worry too much. Microsoft has its own default anti-malware, Windows Defender. It's automatically enabled no matter you have other antivirus applications installed or not. So even if you disable the antivirus programs you installed, Windows Defender is always there.

Fix 7. Uninstall Any Flash Player Update

Uninstalling any flash player update is also reported as a good solution that has helped some users get out of disk utilization 100 Windows 10. To do so, go to Settings > Update & Security > Windows Update > Advanced Options > View your update history > Uninstall updates. Then uninstall flash player update.

uninstall update

Fix 8. Reset Virtual Memory

Virtual memory is a portion of your hard drive and is regarded as an extension of your computer's physical memory. When the RAM isn't enough to perform a task, Windows will temporarily store files in virtual memory, and swap them back to RAM when required. Unreasonable virtual memory may lead to Windows 10 high disk usage.

Here is how to reset virtual memory:

Step 1. Press "Win+Pause/Break" keys to call out "System" information. Then choose "Advanced system settings" on the left panel.

advanced system settings

Step 2. Go to the "Advanced" tab, and click "Settings".

enter system settings

Step 3. Go to the "Advanced" tab, and choose "Change…" in the Virtual memory section.

change settings

Step 4. Make sure "Automatically manage paging file size for all drives" is NOT checked. Then highlight your system drive and customize the Initial size and Maximum size for your virtual memory.

Initial size: this value can vary depending on your computer. If you're not sure what value to enter, just enter the recommended number.
Maximum size: it is recommended to set this value 1.5 times the size of your physical RAM. If you PC has a 4GB (4096 MB) RAM, the value should be no more than about 6,144 MB (4096 MB x 1.5).

Finally, click "Set", and then "OK" to continue.

custom size

Step 5. Now it is time to clear all temporary files on your PC. Press "Win+R" keys to call out the Run dialogue, then type "temp" and hit Enter. This will invoke Windows Explorer, with your Temp folder open.

run temp

Step 6. Select all the files in the Temp folder and delete them.

Wait a few minutes and see if Windows 10 100 disk usage is fixed.

Fix 9. Perform a Disk Check

If the above solutions all do not help, it is necessary having a check of your hard drive. You can do this by using MiniTool Partition Wizard Free which simplifies things within a few clicks. With this tool, you can manage hard drive partitions in all aspects even you are not professional. Download MiniTool Partition Wizard Free and install it on computer.

Step 1. In the main interface of MiniTool Partition Wizard, select the system partition from the disk map and choose Check File System from the action panel.

check file system

Step 2. Select Check & fix detected errors in the pop-up window. Then click Start to begin.

check and fix errors

Continue to check and fix errors on the rest drives. If no error is found, you can try the 10th way.

Fix 10: Wipe SSD and Reinstall Windows 10

The last resort is to totally wipe the hard drive and reinstall Windows 10. You may completely back up the SSD, prepare a Windows 10 installation media, and do a clean install.

First Move. Prepare a Windows 10 Installation Stick
Download a new ISO from Microsoft, burn it on a memory stick so that you can use it to install Windows 10 later.

Second Move: Back up SSD
Back up Windows 10 hard drive is necessary. On the one hand, all important data are safeguarded. On the other hand, if the reinstallation does not help at all, you do have a chance to return to your previous Windows 10 to avoid the troublesome system settings and application installations.

Here you can also use MiniTool Partition Wizard Free to do this job.

Step 1. After launching and MiniTool Partition Wizard, select the system disk as the source disk and choose Copy Disk from the menu.

copy disk

Step 2. Choose a hard disk as the target disk. It is important to know that all data on the target disk will be removed for a successful disk clone.

select target disk

Step 3. Continuing to the next page, you see several copy options are listed here. Select the desired options you want and go on.

copy options

Step 4. When coming across the "how to boot from the new disk" message, read it carefully and click Finish.

Step 5. Finally, click Apply to start copying the whole drive.


Third Move: Reinstall Windows 10
Connect the memory stick you just prepared and follow the installation process to complete. When you see "Where do you want to install Windows", select each partition to do the deletion and then choose the unallocated space to do a clean install.

where to install windows

Now you can check whether Windows 10 high disk usage is reduced. If NOT, you can replace the hard drive by using the backup copy.

recommend You might also be interested in: Solved - Windows Backup Failed Not Enough Disk Space with 0x80780119 Code.


Here comes to the end of this post. Now 10 solutions to Windows 10 100% disk usage in task manager are introduced. You may try them one by one. Hope they are helpful. If you have any question or better suggestion, leave it in the following comment section or send email to [email protected]. We read every thread!