BUG #6456: no password

The following bug has been logged on the website:

Bug reference:      6456
Logged by:          tmpfs1987
Email address:      tmpfs@hotmail.com
PostgreSQL version: 9.0.6
Operating system:   windows xp
Description:=20=20=20=20=20=20=20=20

I used the postgreSQL some time ago and it created an account on my windows
folder, now I re installed it after downloading a more recente version, but
now I can't finish the installation because it asks me about for a superuser
password that I don't know where to get, I tried the one from the website
registration but doesn't work. thanks for your time