How to Fix Microsoft Office SDX Helper High CPU on Windows 11/10 - MiniTool

The Microsoft Office SDX Helper process occupies too much CPU, causing rapid battery consumption and even system stuttering, especially when the CPU usage reaches 100%. This article will explain how to resolve the "Microsoft Office SDX Helper high CPU usage" problem.

What is Microsoft Office SDX Helper?

Microsoft Office SDX Helper (sdxhelper.exe) is a process related to Microsoft Office. It is Microsoft's Security Download Manager for secure download and update Office modules.

If the computer is running slowly, the Office SDX Helper process may be found in the Task Manager to take up a lot of CPU resources (15% to 70%). Here are some reasons that may cause the "Microsoft Office SDX Helper high CPU occupancy" problem:

1. Office and Windows systems have not been updated to the latest version.
2. Microsoft Office installation is corrupt or installation error.
3. Antivirus conflict.
4. Office document cache is corrupted.

How to fix Microsoft Office SDX Helper's high CPU occupancy issue?

Method 1: Update Microsoft Office and Windows Systems

Update Microsoft Office and Windows to the latest versions usually solve this problem.

Update Microsoft Office:

1. Launch any Microsoft Office application (such as Word, Excel, PowerPoint, etc.).
2. Click the File tab > Account.
3. Click the "Update Options" drop-down menu and select "Update Now".

Update Windows 11 or 10:

1. Press the Windows I key to open Settings.
2. Click "Windows Update" and then click the "Check for Updates" button. Windows will search for available updates and follow the on-screen instructions to complete the update process.

Method 2: Reinstall Microsoft Office

Reinstalling Microsoft Office can fix some installation errors.

1. Open Settings > Apps.
2. Find the Microsoft Office application, click the "Uninstall" button and confirm.
3. Visit the Microsoft Office official website to download and reinstall.

Method 3: Add SDX Helper exceptions to the antivirus software settings

If the antivirus software interferes with the Office update module, it may cause the SDX Helper CPU usage to be too high. You can try the following steps:

Step 1: Temporarily disable the antivirus software and check whether SDX Helper still occupies high CPU.

Step 2: If the problem is solved, you need to add exceptions to the following files in the antivirus settings:

64-bit system:

%programfiles%\microsoft office\root\vfs\programfilescommonx64\microsoft shared\office16\

32-bit system:

%programfiles(x86)%\microsoft office\root\vfs\programfilescommonx64\microsoft shared\office16\

Method 4: Clear Office document cache

Clearing Office document cache may resolve the issue.

Step 1: Start "Office Upload Center" with administrator permissions and open its "Settings".

Step 2: Click "Delete Cache Files" and restart the computer.

Method 5: Disable certain tasks in the task scheduler

Disabling certain tasks in the Task Scheduler may be helpful.

Step 1: Open Task Scheduler from the Start menu.

Step 2: Navigate to the "Task Scheduler Library > Microsoft > Office" section in the left panel.

Step 3: In the middle panel, right-click the Office Feature Update task, and then click Disable.

Step 4: Repeat Step 3 for the "Office Feature Update Login" task. Finally, restart the computer.

Method 6: Rename the SDX Helper file

If the above method is invalid, you can try renaming the SDX Helper file.

Step 1: Open the Task Manager and end the SDXHelper.exe process.

Step 2: Go to the following address in File Explorer:

C:\Program Files (x86)\Microsoft Office\root\vfs\ProgramFilesCommonX86\Microsoft Shared\OFFICE16

Step 3: Right-click sdxhelper.exe and select "Rename".

Step 4: Enter a new file name (including the extension).

Conclusion

If your computer has a high CPU usage problem with Microsoft Office SDX Helper, please try the above method to solve this annoying problem.

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