from the link I posted on the last page:
[quoter7n]
3.1) PostgreSQL and/or the installer crashes at startup, fails to start or hangs on start
By far most common reasons for this are antivirus and firewalls. If you have any firewall software installed on your machine, try either disabling it or uninstalling it. If you have any antivirus software installed, you must disable it for the directories that are to be used by PostgreSQL. If that still does not help, it may be required to completely uninstall the software from the machine.
Specific issues have been reported with the nod32 antivirus product. If you are using this product, add "postmaster.exe" to the list of excluded processes (available under advanced options). This has been reported to fix the problem.
Specific issues have also been reported with McAfee and Panda anti-virus software and NetLimiter network monitoring software. While some people do have PostgreSQL working with these software packages, there is no specific or even recommend solutions that have not worked in some cases, so the issues would appear to be installation specific, sometimes even requiring uninstallation.
[/quoter7n]
Are you running any of these?
heh, I'm unlikely to give up - Josh / AP10 even less likely
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FWIW, although this may seem like a pin in the ass now - you are doing great service to PT3 if you can help figure out what is causing the trouble, so thank you
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EDIT: If I had a computer behaving like this (not letting me install / uninstall things cleanly) - and I didn't know why - I'd format / reinstall XP. Not recommended unless you are familiar with the process - and I guess if you were, you'd have considered it already
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