The Oracle installation directory is deleted manually, note that because the installation failed, automatic unloading is not to delete clean, be sure to do it yourself. Also delete the/programfiles/oracle. At this point, only the Oracle entity on the hard disk is removed.
Delete Registry information: Start-run--regedit into the registry edit page, pilot out the registry, save and then delete,
Hkey_local_machine->software->oracle the entire directory is erased. Next, look for the Oracle field in the registry, and if any, delete its key values, then, F3, find one, delete one, and empty the registry for all the values of the Oracle-related fields. According to my personal experience, if you install the system and then install Oracle, only the Hkey_local_machine->software->oracle directory in the registry has fields related to Oracle. So delete this and then you can. If the. Net,pl/sql is installed, there may be some keywords in these software that will appear in the Oracle field, but these fields will not affect the Oracle installation, so just delete the hkey_local_machine->software-> Oracle This directory allows you to eliminate the need to delete fields from other software. Once these are deleted, you should be able to reinstall Oracle.
This article is from the "Banana" blog, please make sure to keep this source http://8510298.blog.51cto.com/8500298/1550195
Windows Uninstall Oracle