The following bug has been logged online:

Bug reference: 1635
Logged by: Tom
Email address: thenrich (AT) erdc (DOT) k12.mn.us
PostgreSQL version: 8.0
Operating system: Windows 2000
Description: Failed to create process for initdb
Details:

I'm trying to reinstall PostgreSQL and during the install I'm getting the
following error. Then it shuts down the install.

Failed to create process for initdb: Logon failure: unknown user name or bad
password

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Did you remove the postgres user account before reinstalling?

On Wed, Apr 27, 2005 at 06:49:59PM +0100, Tom wrote:
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TIP 4: Don't 'kill -9' the postmaster