This is a Git pull from 18 hours ago. I assume it is an error with Composr even if I close the browser then reopen and browse to localhost/ it turns it into www.localhost\.com/ and appends 'index.php?page=start' to the end.
Happening on the latest pull from 2 hours ago, only difference being the page= is blank. The URL when hovered is localhost\/index.php (I assumed the browser is adding the www and .com
%5C is "\". I suspect you typed the wrong slash when calling up the installer and it propagated. Some things probably recovered from it, others did not.
Or maybe before your Windows Apache config normalised itself, or was configured to, unix style slashes (which are also web style), as opposed to Windows style.
$SITE_INFO['base_url'] = 'http://localhost%5C';
Just noticed it's being set to that in the installer, see screenshot.
(Click to enlarge)
(Click to enlarge)
CMS always enforces configured base URL.