Please read the patch README file before installing the patch.
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Open a Command Prompt window as an administrator and go to the patch folder (for example, 35962832).
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Shutdown all Oracle services.
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Explicitly stop the Distributed Transaction Coordinator service (which is not an Oracle service) if it is running.
net stop msdtc
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Type the following commands:
set ORACLE_HOME=<SAMPLE: C:\oracle\19c_client\client>
set PATH=%ORACLE_HOME%\Opatch;%ORACLE_HOME%\perl\bin;%PATH%
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Type opatch apply and press ENTER to launch the opatch installation.
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Make sure that all instances using this ORACLE_HOME are shut down, then twice, enter Y to continue.
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If the installation completes successfully, the message OPatch succeeded displays.