Deinstall Oracle 11g Binary and Re-install the Oracle 11g Binary on Windows

Step 01 :

Go in to ORACLE_HOME/deinstall/    folder and  run deinstall.bat file

it will ask some questions

• Path for Oracle_Home
• Database Name
• Listener Name

Provide the correct answer for those.

Now bat will be finished executing.

Step 02 :

Then need to clear the registry 

goto RUN  window 

type regedit    #appears  a window there 

right side of the window go along the following path 

COMPUTER -->HKEY_LOCAL_MACHINE  --> SOFTWARE --> ORACLE

Right click on oracle and select delete.

Now registry is clear.

Step 03 :

Right click My computer go to Manage  --> shows up a window

Right column of the window there appears a services and applications

Then click on services

there you could see  

      OracleOraDb11g_home1TNSListener

      OracleServiceFIN       #FIN is  sid

stop those services also. 

step 04 :

Go to environment variables in My computer and unset the path of ORACLE_HOME.

Remove oracle_home in path variable :)

Now you are ready to install the new oracle binary :)