The following bug has been logged online:
Bug reference: 3996
Logged by: James P. Yalem
Email address: jpyllc55(at)sbcglobal(dot)net
PostgreSQL version: 8.2 or 8.3
Operating system: Windows XP
Description: Reinstalling after uninstall
Details:
When I try to reinstall 8.3 or 8.2 after uninstalling 8.2, I get an error
message that the user postgres already exists and the installation program
shuts down.