local install wordpress, remote access cannot see images

[ Moderator note: moved to Fixing WordPress. ]

Hi there,

I downloaded wampserver from https://www.wampserver.com/en/ and installed Version 3.0.6 – 64bit to my local windows 7, it has apache 2.4.3. then setup MySql on local machine and installed wordpress 4.7.5 (downloaded from www.ads-software.com). wordpress works fine locally . I can login, I can add page and do works.

Now I need to access wordpress from another machine. I changed apache httpd-vhosts.conf so that it has my machine name and allow access for all.
<VirtualHost *:80>
ServerName mymachine
DocumentRoot C:/wamp64/www
<Directory "C:/wamp64/www/">
Options +Indexes +Includes +FollowSymLinks +MultiViews
AllowOverride All
Require all granted
</Directory>
</VirtualHost>

Now I can access wordpress home page from other machine, but the trouble for me is from other machine, the wordpress page does not show images, the page just show links and text. When I click the link like “login”, the url is still using “localhost/wordpress/wp-login.php”. I checked other parts, images do not show up also because the link is using localhost.

I checked apache httpd.conf file, I already changed ServerName to use the my pc’s name, not localhost.
ServerName mymachine:80

Is it possible somewhere in wordpress code that it is reading something and think the url should be localhost? Does anyone know where I can fix it?

Thanks a lot,
Helen