完全卸载Oracle：包括注册表清理

To remove all Oracle registry keys from a computer:
        1. Log in as a member of the Administrators group.
        2. Make sure that you have stopped Oracle services by following the instructions in
        the "Stopping Oracle Services" section on page 6-3.
        3. Start the registry editor at the command prompt:
        SYSTEM_DRIVE:\> regedit
        4. Go to HKEY_CLASSES_ROOT.
        5. Delete keys that begin with Ora, Oracle, Orcl, or EnumOra.
        This collection of keys includes those that begin with the following:
            ¡ö EnumOraHomes
            ¡ö OracleConfig
            ¡ö OracleDatabase
            ¡ö OracleHome
            ¡ö OracleInProcServer
            ¡ö OracleProcess
            ¡ö ORADC
            ¡ö ORAMMCCFG10
            ¡ö ORAMMCPMON10
            ¡ö OraOLEDB
            ¡ö OraPerfMon
            ¡ö ORCLMMC
            ¡ö ORCLSSO
        6. Go to HKEY_CURRENT_USER
        7. Delete the ORACLE key.
        8. Go to HKEY_CURRENT_USER\Software.
        9. Delete all Oracle keys, including Oracle-HOME_NAME entries under:
        Microsoft\Windows\CurrentVersion\Explorer\MenuOrder\Start
        Menu\Programs.
        10. Go to HKEY_LOCAL_MACHINE\SOFTWARE and search for the ORACLE group key.
        Select ORACLE and note the value of the inst_loc key. This is the location of