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    oracle xe service instance failed

    While installing Oracle XE database into windows operating system some times we might face below error message.
    Checking for oracle XE service instance : failed

    Actual Reason:
    Actually we face this failed message because we haven't done Uninstalling of previously installed XE completely. when we tried to install for the second time we will be facing this failed message.
    So first we have to clear those registries.


    Now open cmd prompt using admin rights and change the existing user path to system32.

    cd C:\windows\system32
    Now use the command sc delete OracleServiceXE
    Now we can see a success message after deleting those registries. 




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