Can't get rid of InstallCore because it was already running in the background?
Are you trying to manually uninstall InstallCore from you Windows computer?
Are you annoyed that you can't totally remove InstallCore through "Uninstall a Program" in Windows Control Panel when you installed it by accident?
Are you looking for the InstallCore removal guides so that you could delete it from your browsers such as Firefox, Google Chrome or Internet Explorer?
To avoid the annoying problem, you could learn how to fully get rid of InstallCore step by step in this article to protect and free up your PC.