Issue: You experience problems installing EPM System products after uninstalling then.
Solution:
Windows—Follow these steps to clean up your machine:
Stop all services.
Uninstall from the Windows Add and Remove Programs option.
In C:/Documents and Settings/install_user/, delete .oracle.instances.
Rename program files/common files/installshield/universal/common as program files/common files/installshield/universal/common_hyperion.
Restart the system.
UNIX—Remove all entries for previous installation in ~/oraInventory/ContentsXML/inventory.xml (Otherwise, the installer does not recognize MIDDLEWARE_HOME.)