I am also facing the same type of issue as you faced earlier. Followed the steps you have mentioned but in my case there is no luck even after following all your steps. please help me in resolving this..
How to check prweb is in running state? I installed tomcat and can confirm that tomcat is up.
Also i can see in services.msc , no Orcale related applications has been installed. Weird is, when i installed 2 days back i was able to work on the application. Later when i tried today i'm getting the below error.
HTTP Status 404 - /prweb/PRServlet
type Status report
descriptionThe requested resource is not available.
I have tried installation many time, i'm able to work only on the day of installation. Can you please help with this?