Manages resource coordination, background streaming, and system integration of Microsoft Office products and their related updates. But in this case, even when I had no office app open, this Click-to-Run thing would take about 30% CPU resources. But it usually does not take such high resources. What Does Office Click-to-Run (SxS) EXE do? Notice the Microsoft Excel, Word and Microsoft Office Click-to-Run (SxS) CPU usage: all taking more than 25% CPU. When I opened the Task Manager, this is how it looked like: My laptop would often heat up and become unresponsive too, especially when using any MS Office apps. I’m using Windows 10 and Microsoft Office 2019 with latest updates installed. These apps usually do not take much processing or memory. A constantly high CPU usage for Microsoft Office apps. That is exactly what I noticed over past week or so. However, a consistent high usage could be sign of a problem, or a bug. In Windows 10, high CPU usage is often a sign of some background app processing activity.

Office click to run