I'm having huge issues trying to delete the oracle database 11g. I tried the OUI but It didn't work(it shows a warning telling me that you should use deinstall which doesn't work either). After that, I tried delete the folders manually and again it tells me that I can't because some folders or files are used. It's really frustrating, now I can't delete nore install a database.
Note : I followed the steps that tell to stop the services and remove the keys using regedit. Please help.