How to Fix High CPU Usage from Microsoft Office Click-to-Run
Question details
The user is experiencing significant system slowdowns because Microsoft Office Click-to-Run processes are automatically starting up and consuming high CPU resources.

- Product
- Microsoft Office
- Device & OS
- Windows
- Scenario
- System boot-up or running Office applications in the background.
- Observed behavior
- Multiple Click-to-Run background processes launch during Windows startup, taking up a large percentage of CPU processing power and reducing overall computer performance.
Save all your ongoing work and ensure you are logged into your Windows PC with an administrator account, as modifying system services requires administrative privileges.
Temporarily Restart or Disable the Click-to-Run Service
Restarting the service can clear temporary stuck update loops causing high CPU usage. If troubleshooting requires it, you can disable the service temporarily.
Office Click-to-Run processes manage software installation, updates, and core Microsoft 365 functionality. Completely disabling them permanently is not recommended as it will interrupt essential Office updates and online features.
Press the Windows key + R to open the Run dialog box. Type 'services.msc' and press Enter.
Scroll down the list of services until you find 'Microsoft Office Click-to-Run Service'.
Right-click on the service and select 'Restart'. Wait a few moments to see if your CPU usage returns to normal.
If the issue persists, right-click the service, select 'Properties', change the 'Startup type' to 'Disabled', and click 'Stop'. Click 'Apply' and 'OK'.

Run the Microsoft Office Repair Tool
A corrupted Office installation can cause the Click-to-Run process to get stuck in an endless loop, consuming system resources.
Try a Lightweight Office Suite with WPS Office
Tired of heavy background processes and high CPU usage slowing down your PC? WPS Office is a free, incredibly lightweight alternative to Microsoft Office. It doesn't rely on resource-heavy background update services, ensuring your computer stays fast while offering full compatibility with your existing documents.
- 1. Download the Installer: Visit the official WPS Office website and click on the 'Download WPS Office Free' button.
- 2. Install Quickly: Run the setup file. The lightweight installer requires minimal system resources and completes in just a few clicks.
- 3. Open Your Documents: Launch WPS Office. It will automatically recognize and flawlessly open all your existing Microsoft Office files.

Frequently Asked Questions
What exactly does the Microsoft Office Click-to-Run process do?
Click-to-Run is a Microsoft technology that handles the installation, updating, and background execution of Microsoft 365 and Office applications. It continuously runs to ensure your software is always up-to-date with the latest security patches and features.
Is it safe to permanently disable the Click-to-Run service?
No, permanently disabling it is not recommended. It will prevent your Office applications from receiving crucial security updates and may break essential features within Microsoft 365. It should only be disabled temporarily for troubleshooting.
Why is Click-to-Run using so much CPU during Windows startup?
It typically consumes high CPU when it is actively downloading and applying software updates in the background. It can also cause high CPU usage if the Office installation has become corrupted and the updater is stuck in a loop.
Does WPS Office use a similar Click-to-Run background service?
No, WPS Office is intentionally designed to be lightweight and does not rely on heavy, constant background updater services like Click-to-Run. This makes it a highly efficient alternative, especially for computers with limited processing power.




