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Upon reboot, check if the SDX Helper is working fine.Delete Cached Files in the Settings of Microsoft Office Upload Center Now click on Delete Cached Files and reboot your PC.

Launch the Office Upload Center (either from the system’s tray or the Start menu) with administrative privileges and open its Settings.In this case, clearing the office document cache may solve the problem. You may encounter the error at hand if the Office document cache is corrupt.

Solution 4: Clear the Office Document Cache

After adding an exception, make sure to enable your antivirus and check if the high CPU issue is resolved.

If so, then you may have to add exceptions for the SDX Helper in the antivirus settings for the following files:įor 64-bit: %programfiles%\microsoft office\root\vfs\programfilescommon圆4\microsoft shared\office16\ For 32-bit: %programfiles(x86)%\microsoft office\root\vfs\programfilescommon圆4\microsoft shared\office16\.

Disable your antivirus temporarily and check if the SDX Helper is not causing high CPU usage.

Warning: Advance at your own risk as editing the settings of your antivirus product may expose your system/data to threats that are not limited to viruses, trojans, etc. In this case, exempting SDX Helper in the antivirus settings may solve the problem. You may encounter high CPU usage by SDX Helper if your antivirus is interfering with the operation of the Office Update module. Solution 3: Add Exception for SDX Helper in the Antivirus Settings

Then check if the system is clear of the high CPU usage.

Now click on the Repair button and wait for the completion of the repair process (this may take some time to complete).

If not, then repeat steps 1 to 3 but at step 3, select Online Repair.

Then check if the SDX helper issue is resolved.

Now click on the Repair button and wait for the completion of the repair process.

Then click on Modify (click Yes if UAC prompt received) and select Quick Repair.

Now select Apps and then expand the office installation.

In this case, repairing the office installation may solve the problem. The SDX issue could be a result of a corrupt installation of your office suite. Solution 2: Repair the Office Installation

Then check if an update is available, if so, then update the office installation and check if it solves out the high CPU usage.

Now click on Update Options and select Update Now.

Now launch an office product (for example, MS Word) and steer to its File tab.

Also, make sure no optional update is pending.

Update Windows of your PC to the latest version.

In this context, updating the office/Windows to the latest build may solve the problem. You may encounter the issue at hand if your office installation or Windows of your system is outdated as it can create incompatibility between the Office and OS modules. Microsoft updates its Office products to cater to the latest technological advancements and patch known problems. Solution 1: Update Office and Windows of Your PC to the Latest Build Microsoft Office SDX Helper High CPU Usageīefore moving on, make sure your network connection is not set as Metered Connection. The user sees the continuous high CPU usage by the Office SDX Helper process (something between 15% to 70%) in the Task Manager of his system as he was encountering the sluggishness in the PC. Moreover, hindrance from antivirus application or corrupt Office Document Cache may also result in the issue at hand. Sdxhelper.exe is used to securely download and update Office. Microsoft Office SDX Helper may show high CPU usage if your Office installation is outdated or corrupt.