I have been experimenting with Postgresql on windows since version 8.3. However I never read much documentation. Previously I was always using Windows XP Prof. with older versions of Kaspersky Internet Security. Recently I bought Windows 7 Prof. 32 bit and also the 2010 version of Kaspersky. I never had any problems with Postgresql under my old configuration. Is Postgresql more "sensitive" under Windows 7 or do you think it's perhaps my 2010 Kaspersky? I struggled for a couple of days before I could get it working under my new configuration. I see in win 7 you have to say "run as administrator". Also, after I temporarily disabled my antivirus and firewall software the installation worked. When I tried to connect with PGAdmin it kept rejecting my password. The funny thing was that it never asked me for a username, only a password. Now I remember from previously that Postgres was also the default username. I managed to register the user Postgres under PGAdmin and it worked. Didn't it previously automatically register/create the Postgres user for PGAdmin? Any way, everything seems fine now for my local Postgres installation. I think next time i'll first look in the docs. I must say I am surprised how many people respond to questions and how quickly they do it as well.