The thing on the photo is the only thing that is visible after starting any app from the Corel Suite X8
WIN10? How many times have you reinstalled? When you uninstalled to you also choose to remove all user files? Reboot before installing?
Yes Windows 10. I’ve reinstalled twice. Both times I removed all user files because otherwise installator complained that the program is already installed.
Rebooted after uninstall? I would also do a search in the registry for any instance of Corel and delete those entries. Then do a hard reboot (shut down pc for 10 minutes).