1、删除Oracle 方法以及顺序参考百度经验
2、删除ORACLE 11g 数据库安装注册表
每次卸载完ORACLE 后，注册表的清理都是一件很棘手的工作，刚刚从网上找到了一个完整的清理条目，备份一下，便于以后使用。
Windows Registry Editor Version 5.00
[-HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE]
[-HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE\ODP.NET]
[-HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\MenuOrder\StartMenu\Programs\Oracle - OraClient11g_home1]
[-HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\eventlog\Application\Oracle.VSSWriter.CD]
[-HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Eventlog\Application\OracleServices for MTS]
[-HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Eventlog\Application\Oracle.portal]
[-HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Eventlog\Application\OracleDBConsoleportal]
[-HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\OracleDBConsoleorcl]
[-HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\services\eventlog\Application\Oracle.VSSWriter.CD]
[-HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Services\Eventlog\Application\OracleServices for MTS]
[-HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Services\Eventlog\Application\Oracle.portal]
[-HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Services\Eventlog\Application\OracleDBConsoleportal]
[-HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\services\eventlog\Application\Oracle.cd]
[-HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\services\OracleDBConsoleorcl]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Oracle11]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Oracle11\Performance]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Oracle11\Performance\KEY_OraDb11g_home1]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleDBConsolemain]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleDBConsolemain\Security]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleDBConsolemain\Enum]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleDBConsoleoracl]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleDBConsoleoracl\Security]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleDBConsoleoracl\Enum]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleJobSchedulerMAIN]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleJobSchedulerMAIN\Security]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleJobSchedulerORACL]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleJobSchedulerORACL\Security]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleMTSRecoveryService]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleMTSRecoveryService\Security]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleMTSRecoveryService\Enum]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleOraDb11g_home1ClrAgent]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleOraDb11g_home1ClrAgent\Security]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleOraDb11g_home1TNSListener]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleOraDb11g_home1TNSListener\Security]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleOraDb11g_home1TNSListener\Enum]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleRemExecService]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleRemExecService\Security]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleRemExecService\Enum]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleServiceMAIN]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleServiceMAIN\Security]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleServiceMAIN\Enum]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleServiceORACL]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleServiceORACL\Security]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleServiceORACL\Enum]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleVssWriterMAIN]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleVssWriterMAIN\Security]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleVssWriterMAIN\Enum]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleVssWriterORACL]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleVssWriterORACL\Security]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleVssWriterORACL\Enum]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Eventlog\Application\OracleServices for MTS]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Eventlog\Application\Oracle.main]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Eventlog\Application\Oracle.oracl]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Eventlog\Application\Oracle.VSSWriter.MAIN]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Eventlog\Application\Oracle.VSSWriter.ORACL]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Eventlog\Application\OracleDBConsolemain]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Eventlog\Application\OracleDBConsoleoracl]
[-HKEY_CLASSES_ROOT\ORAMMCCFG11.ComponentData]
[-HKEY_CLASSES_ROOT\ORAMMCCFG11.ComponentData\CurVer]
[-HKEY_CLASSES_ROOT\ORAMMCCFG11.ComponentData.1]
[-HKEY_CLASSES_ROOT\ORAMMCCFG11.ComponentData.1\CLSID]
[-HKEY_CLASSES_ROOT\ORAMMCPMON11.ComponentData]
[-HKEY_CLASSES_ROOT\ORAMMCPMON11.ComponentData\CurVer]
[-HKEY_CLASSES_ROOT\ORAMMCPMON11.ComponentData.1]
[-HKEY_CLASSES_ROOT\ORAMMCPMON11.ComponentData.1\CLSID]
[-HKEY_CLASSES_ROOT\ORCLMMC.About]
[-HKEY_CLASSES_ROOT\ORCLMMC.About\CLSID]
[-HKEY_CLASSES_ROOT\ORCLMMC.About.1]
[-HKEY_CLASSES_ROOT\ORCLMMC.About.1\CLSID]
[-HKEY_CLASSES_ROOT\ORCLSSO.ComponentData]
[-HKEY_CLASSES_ROOT\ORCLSSO.ComponentData\CurVer]
[-HKEY_CLASSES_ROOT\ORCLSSO.ComponentData.1]
[-HKEY_CLASSES_ROOT\ORCLSSO.ComponentData.1\CLSID]
[-HKEY_CLASSES_ROOT\OracleConfig.OracleConfig]
[-HKEY_CLASSES_ROOT\OracleConfig.OracleConfig\CurVer]
[-HKEY_CLASSES_ROOT\OracleConfig.OracleConfig.1]
[-HKEY_CLASSES_ROOT\OracleConfig.OracleConfig.1\CLSID]
[-HKEY_CLASSES_ROOT\OracleDatabase.OracleDatabase]
[-HKEY_CLASSES_ROOT\OracleDatabase.OracleDatabase\CurVer]
[-HKEY_CLASSES_ROOT\OracleDatabase.OracleDatabase.1]
[-HKEY_CLASSES_ROOT\OracleDatabase.OracleDatabase.1\CLSID]
[-HKEY_CLASSES_ROOT\OracleHome.OracleHome]
[-HKEY_CLASSES_ROOT\OracleHome.OracleHome\CurVer]
[-HKEY_CLASSES_ROOT\OracleHome.OracleHome.1]
[-HKEY_CLASSES_ROOT\OracleHome.OracleHome.1\CLSID]
[-HKEY_CLASSES_ROOT\OracleInProcServer.XOraServer]
[-HKEY_CLASSES_ROOT\OracleInProcServer.XOraServer\CLSID]
[-HKEY_CLASSES_ROOT\OracleInProcServer.XOraServer\CurVer]
[-HKEY_CLASSES_ROOT\OracleInProcServer.XOraServer.5]
[-HKEY_CLASSES_ROOT\OracleInProcServer.XOraServer.5\CLSID]
[-HKEY_CLASSES_ROOT\OracleInProcServer.XOraSession]
[-HKEY_CLASSES_ROOT\OracleInProcServer.XOraSession\CLSID]
[-HKEY_CLASSES_ROOT\OracleInProcServer.XOraSession\CurVer]
[-HKEY_CLASSES_ROOT\OracleInProcServer.XOraSession.5]
[-HKEY_CLASSES_ROOT\OracleInProcServer.XOraSession.5\CLSID]
[-HKEY_CLASSES_ROOT\OracleProcess.OracleProcess]
[-HKEY_CLASSES_ROOT\OracleProcess.OracleProcess\CurVer]
[-HKEY_CLASSES_ROOT\OracleProcess.OracleProcess.1]
[-HKEY_CLASSES_ROOT\OracleProcess.OracleProcess.1\CLSID]
[-HKEY_CLASSES_ROOT\ORADC.ORADCCtrl.1]
[-HKEY_CLASSES_ROOT\ORADC.ORADCCtrl.1\CLSID]
[-HKEY_CLASSES_ROOT\ORAMMCCFG11.ComponentData]
[-HKEY_CLASSES_ROOT\ORAMMCCFG11.ComponentData\CurVer]
[-HKEY_CLASSES_ROOT\ORAMMCCFG11.ComponentData.1]
[-HKEY_CLASSES_ROOT\ORAMMCCFG11.ComponentData.1\CLSID]
[-HKEY_CLASSES_ROOT\ORAMMCPMON11.ComponentData]
[-HKEY_CLASSES_ROOT\ORAMMCPMON11.ComponentData\CurVer]
[-HKEY_CLASSES_ROOT\ORAMMCPMON11.ComponentData.1]
[-HKEY_CLASSES_ROOT\ORAMMCPMON11.ComponentData.1\CLSID]
[-HKEY_CLASSES_ROOT\OraOLEDB.ErrorLookup]
[-HKEY_CLASSES_ROOT\OraOLEDB.ErrorLookup\CLSID]
[-HKEY_CLASSES_ROOT\OraOLEDB.ErrorLookup\CurVer]
[-HKEY_CLASSES_ROOT\OraOLEDB.ErrorLookup.1]
[-HKEY_CLASSES_ROOT\OraOLEDB.ErrorLookup.1\CLSID]
[-HKEY_CLASSES_ROOT\OraOLEDB.Oracle]
[-HKEY_CLASSES_ROOT\OraOLEDB.Oracle\CLSID]
[-HKEY_CLASSES_ROOT\OraOLEDB.Oracle\CurVer]
[-HKEY_CLASSES_ROOT\OraOLEDB.Oracle.1]
[-HKEY_CLASSES_ROOT\OraOLEDB.Oracle.1\CLSID]
[-HKEY_CLASSES_ROOT\OraPerfMon.OraPerfMon]
[-HKEY_CLASSES_ROOT\OraPerfMon.OraPerfMon\CurVer]
[-HKEY_CLASSES_ROOT\OraPerfMon.OraPerfMon.1]
[-HKEY_CLASSES_ROOT\OraPerfMon.OraPerfMon.1\CLSID]
[-HKEY_CLASSES_ROOT\ORCLMMC.About]
[-HKEY_CLASSES_ROOT\ORCLMMC.About\CLSID]
[-HKEY_CLASSES_ROOT\ORCLMMC.About.1]
[-HKEY_CLASSES_ROOT\ORCLMMC.About.1\CLSID]
[-HKEY_CLASSES_ROOT\ORCLSSO.ComponentData]
[-HKEY_CLASSES_ROOT\ORCLSSO.ComponentData\CurVer]
[-HKEY_CLASSES_ROOT\ORCLSSO.ComponentData.1]
[-HKEY_CLASSES_ROOT\ORCLSSO.ComponentData.1\CLSID]
[-HKEY_CLASSES_ROOT\EnumOraHomes.EnumOraHomes]
[-HKEY_CLASSES_ROOT\EnumOraHomes.EnumOraHomes\CurVer]
[-HKEY_CLASSES_ROOT\EnumOraHomes.EnumOraHomes.1]
[-HKEY_CLASSES_ROOT\EnumOraHomes.EnumOraHomes.1\CLSID]
注：将以上文本复制到文本文档，另存为 .reg 的注册表脚本。导入注册表即可。
3、删除其它文件
[INS-32025] 所选安装与指定 Oracle 主目录中已安装的软件冲突
参考文章
[INS-32102] 指定的 Oracle 主目录用户已存在
参考文章：