If the Proplus.ww folder exists on a local drive (e.g., D:\Proplus.ww) and you no longer need to modify Office features, you can safely delete that specific folder. OSE.exe will then stop attempting on-demand installs from that location. The system copy at C:\Program Files\Common Files\Microsoft Shared\Source Engine\OSE.EXE must remain.
By default, OSE terminates after installation. However, if it remains active, stop the Office Source Engine service (if listed as a service) via services.msc and set to Manual. Proplus.ww Ose.exe
Modern Office versions (2016, 2019, 2021, and Microsoft 365) use a streaming virtualization technology. OSE.exe works with OfficeClickToRun.exe to stage files from the Proplus.ww virtual container. If the Proplus
This usually indicates a network installation point with broken file permissions or a disconnected drive. Solution: Copy the entire Office source to a local drive and run setup from there. Modern Office versions (2016, 2019, 2021, and Microsoft
| Normal | Suspicious |
|--------|-------------|
| C:\MSOCache\...\Proplus.ww\ | C:\Temp\, C:\Users\Public\, %TEMP%\, network share |
To verify you are dealing with a genuine Microsoft file:
If the file is located in C:\Windows\System32, %AppData%, or a temporary folder, it is likely malware impersonation.