BUG #5792: INSTALLER FAILS!!!

The following bug has been logged online:

Bug reference:      5792
Logged by:          Daniel Witkowski
Email address:      daniel.witkowski@gmail.com
PostgreSQL version: 8.4, 9.0
Operating system:   Windows XP
Description:        INSTALLER FAILS!!!
Details:

Make it usable. I tried to install it on admin and not-admin user. I removed
user, service, run vbs scripts manually... All the time I got errors: All
the time i got error: problem running post-install step

This sucks!

Regards,
Daniel