Windows re-installation problem

I uninstalled PostgreSQL from windows for the sake of
re-installing (for the sake of documenting an install for our
product on a clean machine), and now during re-install on the
Service Configuration screen I get "Invalid username
specified: Logon failure: unknown user name or bad password."

Fine makes sense, I was using a new password for the postgres
user... so I went to my computer management and deleted the
postgres user, then rebooted, came back to install... but the
message is still there. Yes I can rename the user from
postgres to postgres2 or some such and things work fine, but
this isn't acceptable for me right now.

Anyone know what else may need to be purged from the system
to allow a re-install with the same name/new password?

Nothing more should be needed, really. make sure it's actually gone -
maybe windows did a rollback-on-reboot? :-)
Possibly delete the user profile, but it shuoldn't have an efefct here.

And
what do the installer developers think about possibly
building that into the installer?

Not likely. Way too dangerous, sicne the account may be used for other
things on other machines.

//Magnus