(In Windows and Apache 2.2.x)
The "Forbidden" error is also the result of not having virtual hosts defined.
As noted by Julien, if you intend to use virtual hosts.conf, then go to the httpd file and uncomment the following line:
#Include conf/extra/httpd-vhosts.conf
Then add your virtual hosts definitions in conf/extra/httpd-vhosts.conf and restart Apache.
