It is used to deliver bug fixes and feature updates to your Office installation. I absolutely do NOT recommend you to prevent sdxhelper from doing its job in any way. After a complete uninstallation and installation of Office, the issue will, – almost certainly-, not return. The only solution to fix it is to re-install Office 365 / Office 2016 / Office 2019.
First signs of high CPU date from early 2019. There are actually user guides that refer to the SDM How to stop Microsoft Office SDX helper from taking high CPU?Īccording to many, the high CPU is rather a bug than it is on purpose to nag you. If you have ever downloaded the Office installation files (which is very common in this Office365 era), this tool was probably shipped with it. Microsoft Office SDX helper appears to be connected to a Secure Download Manager that Microsoft uses to download and update Office. 3.4 Disable Windows Service What is Microsoft Office SDX helper?
