Problems encountered while installing OBIEE after unistalling the previous version

ISSUE 1 :

On running the Oracle XE Database installer, I hit this problem:

"OracleXEService should not be installed already"

[...]
Checking for Oracle XE Service instance…:
Expected result : OracleXEService should not be installed already.
Actual result: OracleServiceXE found on system.
Check complete: The overall result of this check is failed.

This error can be overcome by cleaning the registry properly after uninstalling.Follow this link for cleaning the registry:
http://pagelock.blogspot.in/2012/07/how-to-clear-registry-and-do-clean.html

ISSUE 2 :

The below error comes when trying to run the rcu.bat file

  

Solution: Copy the rcu setup to the desktop and install

ISSUE 3 :

Below error comes when setting up rcu.

Solution: Start OracleXEClrAgent and OracleXETNSListener.Now run rcu.

Till next time :)