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Working on Windows is always productive because there are several Windows Host Processes such as runDLL32 running in the background. However, your Windows PC becomes counterproductive when too many processes start hogging the CPU.

The high CPU usage of runDLL32 process is a growing issue for Windows operating systems, especially in Windows 10.

This essential process runs as a foreground or background service, taking up disk space and processing power along with additional resources.

When Windows Host Process runDLL32 causes high CPU and disk usage, your Windows 10 faces system failures, errors and other issues.

To fix this, let’s learn more about runDLL32.exe (Windows Host Process) and ways to reduce its high CPU usage.

What is RunDLL32 (Windows Host Process)?

An executable file named runDLL32.exe is used on a Windows PC whenever you need to run one or more applications. It is a Microsoft Windows service that runs DLL (Dynamic Link Library) files to help an application run.

RunDLL32 process stores common data on application logic. These stored DLL files are accessed by multiple Win apps to launch themselves. You need these .dll files to launch apps on Windows PC.

Why Does RunDLL32 Cause High CPU and Disk Usage?

Now, this Windows Host Process is a generic software component of Windows OS. When the runDLL32 process starts to malfunction, it is unable to launch apps properly. As a result, runDLL32 takes up more CPU and disk than required.

Since runDLL32 is running in the background, you can’t easily figure out the cause behind Windows slowing down or freezing. You can try rebooting Windows to temporarily fix the runDLL32 high CPU usage.

But, you still need to apply the fix for high disk usage of runDLL32 before it damages any app and corresponding data.

How to Fix High CPU Usage by Windows Host Process “RunDLL32”?

Disabling runDLL32.exe process is not a solution to fix this high disk usage. You can try these solutions below, and test if your Windows PC is able to stop CPU hogging by runDLL32.

1. Get the Process Explorer tool

To fix the high CPU usage on a Windows computer, you need to know how many DLL files are being opened and loaded by this process. Microsoft’s Process Explorer is a tool that shows this information in details.

When you use the Process Explorer for information on parent process, you get details on what caused the high CPU and disk usage of RunDLL32.exe file. In most cases, it happens when too many DLL files are being launched with the runDLL32 process.

To use Process Explorer,

  • Download the file from Microsoft and install this tool
  • Open the Process Explorer to see processes and their details in a window
  • Now, click on File menu
  • Go to “Show Details for All Processes” and click on it


C:\Users\IPOAdmin\Desktop\2019-01-23 17_45_35-In the Services window runDLL32.exe,, locate this process Right-click on it Clic.png


  • Get admin permissions if needed
  • Locate the “runDLL32” process



  • Right-click on runDLL32
  • Click on Properties


  • Under the tab for Image, find details about the process that is extensively using runDLL32.exe

To stop this process from running runDLL32.exe,

  • Open the Run dialog (press Windows + R key)
  • Type “services.msc
  • Press the Enter key
  • In the Services window, locate this process
  • Right-click on it
  • Click on Disable


  • Follow the onscreen instructions to disable the process
  • Click on Apply and OK to save the changes
  • Restart your PC

You can also uninstall an app linked to this process to stop the high CPU usage caused by runDLL32.

 2. Renaming aeinv.dll

Make sure you log in as administrator before following these steps.

  • Open a File Explorer window
  • Go to C: drive
  • Open Windows folder and go to System32 folder
  • Here, type “aeinv.dll” in the search box


Renaming aeinv.dll

  • Locate the Application Experience Inventory DLL (aeinv.dll)
  • Right-click on the file
  • Click on Rename

Renaming aeinv.dll

  • Change it to “oldaeinv.dll
  • As the admin of your PC, click on Continue to grant permission for renaming the DLL file

If you face problems with the admin permissions for amending this DLL, obtain ownership of aeinv.dll as follows –

  • Log in as an administrator
  • Open the File Explorer and go to C:\Windows\System32 file path
  • Locate aeinv.dll and right-click on it
  • Click on Properties


Renaming aeinv.dll

  • Under the Security tab, click on Advanced

Renaming aeinv.dll


  • In the Owner section, choose Edit and select the Admin account
  • After selecting ‘Administrators’, click on Apply and OK
  • Now, go back to Properties window
  • Under the Security > Advanced tab, click on Permissions
  • Here, click on Edit and tick the “Allow” box for “Full Control

Renaming aeinv.dll

  • Click on Apply and OK to save changes

Now, you can rename the aeinv.dll file without any trouble.

 3. Disable with Task Scheduler

When runDLL32 causes high CPU usage after Windows 10 installation, disabling some installed items can become a possible fix.

For several users who faced this issue after installing or updating Windows 10, follow these steps to disable some selected items with the Task Scheduler tool.


  • Open Control Panel, press Win + R  button on the keyboard and type Control Panel and hit enter

Control Panel

  • Click on Administrative tools
  • Now, scroll down and click on Task Scheduler

Disable with Task Scheduler

  • In the Task Scheduler window, go to the left pane
  • Here, navigate to
    • Task Scheduler Library
      • Microsoft
        • Windows
          • Customer Experience Improvement

Here, the right pane shows three items

  • Click on Consolidator and open its Properties window


C:\Users\IPOAdmin\Desktop\2019-01-23 16_12_52-.png

  • Now, click on Edit to change the trigger properties
  • In the Edit Trigger window, uncheck the box for Enabled

Disable with Task Scheduler

  • Return to the list of items, right click of Consolidator, and click on Disabled

Disable with Task Scheduler

  • Follow this for UsbCeip and KernelCeip Task
  • Close the Task Scheduler and reboot your Windows

If disabling these items didn’t fix the runDLL32 high CPU usage, then follow the same steps and click on Enable to revert the changes.

4. Changes with “ProgramDataUpdater” Task

Sometimes, an application may use the runDLL32 process to run numerous DLL files after installing updates. Tasks running under “ProgramDataUpdater” category can particularly result into high disk usage in Windows 10.

You can amend the ProgramDataUpdater tasks and fix the high CPU usage.

  • Type “task scheduler” in the Start menu search box


task scheduler


  • Open the Task Scheduler app
  • Go to Microsoft
  • Expand the list for Windows
  • Click on the Application Experience folder
  • In this folder, right-click on ProgramDataUpdater entry
  • Click on Disabled


task scheduler

  • Reboot your PC

If disabling this task has fixed the issue but is causing more problems, then rest its time limit.

  • Follow the same steps
  • Right-click on ProgramDataUpdater
  • Click on Properties

task scheduler

  • Under the Settings tab, enable the box for “Stop the task if it runs longer than
  • Now, edit the value to 1 minute

C:\Users\IPOAdmin\Desktop\2019-01-23 16_26_39-ProgramDataUpdater Properties (Local Computer).png


  • Click on OK to save the new value
  • Restart your PC

This surely lowers the disk/CPU usage caused by runDLL32. If it didn’t help, follow the same method to revert the changes.

5. Remove the Google App Engine

If there are several Google-run apps on your Windows PC, then an app called Google App Engine might start hogging your CPU. The Google App Engine may rerun the Windows Host Process runDLL32 and consume more disk space.

To remove the Google App Engine,

  • Open the Run dialog (press Windows + R)
  • Type “control panel
  • Open the Control Panel program
  • Go to Programs
  • Click on Uninstall a program link


Remove the Google App Engine

  • Locate the Google App Engine
  • Right-click and select Uninstall
  • Reboot your PC

Now, check the CPU usage and if you see a noticeable reduction then avoid installing Google App Engine thereafter.

6. Disabling Telemetry Services

Telemetry services run on Windows allow the computer to gather data on user experience. These services can sometimes lower the user experience by causing Windows to slow down.

To remove Telemetry Services,

  • Open the Run dialog (press Windows + R)
  • Type “services.msc” and click on OK



  • In the Services window, go to ‘Connected User Experience’ service
  • Double-tap it to open the Settings window
  • Here, click on Stop below the service status
  • Select “Startup type” and click on Disabled
  • To save changes, click on OK and exit

After restarting your PC, open Task Manager to check your CPU usage. When telemetry services are disabled, you’d find a significant drop in runDLL32 process high CPU/disk usage.

7. Turn off Inventory Collector tool

There’s another tool on Windows that checks the computer and identifies installed devices, apps and system info. This ‘Inventory Collector’ tool by Microsoft is run by Application Compatibility Manager.

You can disable Inventory Collector only via Local Group Policy editor.

  • Open the Run dialog and type “gpedit.msc
  • Click on OK
  • When Group Policy Editor is opened, navigate as follows –
    • Computer Configuration
      • Administrative Templates
        • Windows Components
          • Application Compatibility
  • Look for ‘Turn off Inventory Collector’ entry in the right pane


C:\Users\IPOAdmin\Desktop\2019-01-23 16_41_13-Local Group Policy Editor.png


  • Double-click on it to open Properties
  • Click on Enabled toggle


C:\Users\IPOAdmin\Desktop\2019-01-23 16_41_13-Local Group Policy Editor.png


  • Click on OK and restart

Open the Task Manager to see the CPU usage. Disabling the Inventory Collector can lower around 5-10% of disk and CPU usage caused by runDLL32.

8. Remove the Lenovo Dependency Package

On Lenovo PCs and laptops, Windows may slow down due to the high use of runDLL32 by Lenovo Dependency Package (app). Uninstall this software package to find a fix for your high CPU usage issue.

  • Open the Run dialog box
  • Type “control panel” and click on OK
  • Click on Uninstall a program link (under Programs section)
  • Look for Lenovo Dependency Package
  • Right-click on it and select Uninstall
  • Follow the onscreen instructions
  • Restart your PC later

Since the package uses Windows Host Process runDLL32, uninstalling Lenovo Dependency Package can surely lower the high CPU usage.

9. Boot in Safe Mode

The safest way to reduce runDLL32 high CPU usage on Windows is booting the OS in Safe Mode.

When booted in Safe Mode, Windows closes unwanted apps and background services. It also optimizes the CPU usage of Windows Host Processes and stops external apps to overuse them.

  1. Follow the simple steps to reboot Windows 10 in Safe Mode
  2. Open the Task Manager (Run dialog>“taskmgr”>OK)
  3. Check the CPU usage

You can also try to clean-boot Windows 10 to solve the issue –

  • Open the Run dialog (Windows + R)
  • Type “msconfig


C:\Users\IPOAdmin\Desktop\2019-01-23 16_48_22-System Configuration.png


  • Click on OK
  • In the System Configuration window, go to General tab
  • Under Selective startup, un-tick the option for ‘Load startup items
  • Go to Services tab
  • Tick the “Hide all Microsoft services” option
  • Click on Disable All
  • Click on OK and Apply to save changes and exit


C:\Users\IPOAdmin\Desktop\2019-01-23 16_48_22-System Configuration.png


Now, restart your PC to finish the Clean Boot.

If booting Windows 10 in Safe Mode didn’t work, then go for the next solution, which is our final shot at fixing high disk/CPU usage by runDLL32.

10. Rebuild Windows from a Restore Point (only when Safe Mode doesn’t fix)

Your last option is restoring Windows 10 to an earlier state. If the runDLL32 high CPU usage has hogged your CPU beyond repair, rebuilding the Windows OS is the only possible fix.

First, create a restore point on Windows 10. Once the restore point is created,

  • Go to Start menu button
  • Type “control panel
  • Search for “recovery

Rebuild Windows from a Restore Point (only when Safe Mode doesn’t fix)

  • Navigate to Recovery >Open System Restore > Next


Rebuild Windows from a Restore Point (only when Safe Mode doesn’t fix)


  • Select the restore point (created earlier)
  • If you’re OK with the deletions, click on Next and Finish

Let us know if the above tips helped you fix the high CPU usage of Windows Host Process runDLL32 on your Windows 10/8/7 PC.

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