The installer for E107. It'll set up the default E107 system (via running http://localhost/install.php
or whatever the installer name is)
However, I just re-read your original post. Want a copy of your web site on a second machine. Do NOT run the installer.
Here's a dumbed down kinda sorta how you want to do it list.
First off, you'll want an exact copy of your original site's files. The installer should already be gone. (If it's not, remove it now
, it's a huge security hole as anyone can blast your site into smithereens.)
Then, you need to edit the e107_config.php file to match your information. Most notably, you're looking for the database settings. Server name (on your laptop, most likely "localhost", user name, password, database name)
Then, you need to copy your database over. This will vary from system to system. If you're lucky, you'll have PHPMyAdmin on both computers. That'll make it super easy. Just have the regular server to a backup, then on your laptop import that data into a blank database.
In theory, you're more or less done. You'll probably have other settings to look after too (the domain name for the web site.. most CMS's have this, I forget if E107 does. If you see any references to your main web site in the config file, change it to localhost) and so on.
Hope that helps