I upgraded Oracle 11g 11.2.0.1 to 11.2.0.4. on Windows 2008 R2 x64. After I was done, I thought I would get rid of the old Oracle Home. I ran the "deinstall" in the original Oracle home, and it deleted the listener.
Two questions;
1) How can I recreate the listener service?
2) How can I deinstall an Oracle home without removing the listener in the future?