If you see Proplus.ww\OSE.exe running from a temporary folder (e.g., C:\Users\YourName\AppData\Local\Temp ), you are likely in the middle of an Office installation or repair operation.
If you receive a "This app can't run on your PC" error, try running the installer ( Administrator by right-clicking it and selecting "Run as administrator". Complete Clean Uninstall: If a previous installation is corrupted, use the Microsoft Support Uninstall Tool
: This stands for Office Source Engine . It is a helper executable that manages the installation, on-demand feature delivery, and repair processes for Microsoft Office.