The deinstall.bat command removes Oracle Clusterware and Oracle Automatic Storage Management (Oracle ASM) from your server, and Oracle Database installations, for both Oracle RAC and single-instance databases.

• Overview of Deinstallation Procedures
  There are several tasks to perform when completely removing all Oracle databases, instances, and software from an Oracle home directory.
• About Oracle Deinstallation Options
  The deinstall.bat command stops Oracle software, and removes Oracle software and configuration files on the operating system.
• Files Deleted by the Deinstall Command
  The deinstall command removes Oracle software and files from your system.
• Identifying All Instances On a Cluster
  You can identify the database instances on your cluster using either SRVCTL or the Windows Services control interface.
• deinstall Command Reference
  You can run the deinstall command to remove Oracle software. You can run this command from an Oracle home directory after installation.
• Using the Deinstallation Tool to Remove Oracle RAC
  You can run the deinstallation tool in multiple ways.
• Cleaning Up After a Failed Installation
  If an installation fails, then you must remove the Oracle home directory and remove all files that Oracle Universal Installer (OUI) created during the attempted installation.