The following bug has been logged on the website:
Bug reference: 18012
Logged by: Matt Feemster
Email address: matt.feemster@gmail.com
PostgreSQL version: 15.3
Operating system: Windows 10 Pro
Description:
When running the installer it proceeds until just about the end, then hangs
indefinitely trying to initialize the database.
I noticed that when this happened, Notepad++ would open two .bat temporary
batch files.
I realized that the .bat file extension was registered to be opened with
Notepad++, which caused the scripts not to be run, but rather just opened as
text.
Once I de-registered Notepad++ as the default program for .bat files, the
installer completed successfully.
I think you may need to explicitly use cmd.exe to run the .bat files, rather
than just "opening" them.