When doing a full uninstall of the Symantec Endpoint Protection Small Business Edition cloud (SEP SBE), the folder C:\programdata\norton says it cannot be removed.
This can occur when something was quarantined on the machine when it was uninstalled.
You will need to change the permissions or change the name of the folder to continue.
Note: If you still cannot remove the Norton folder, renaming it will allow you to complete the installation. The newly renamed folder may still not allow deletion, but it will not endanger the machine and the next installalation will create a folder to replace it.