Programs sometimes get a corrupted installation and/or corrupted registry entries which prevent them from being removed through the Windows control panel's Programs and Features window.
Therefore, if you try to uninstall the Cloud Windows Client from the Program and Features window and the uninstallation/removal keeps failing, you can use a special program from Microsoft to uninstall it forcefully.
Here is the link from Microsoft. This article applies to:
Or, you can download the uninstaller directly from here: