BUG #18012: Installer fails to run .bat files when they are registered to Notepad++

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.