The installation wizard will ask for your Network Domain, Server Name and Administrator's email address. I've never been sure what to enter in the first two entries, so I enter scripting.com for the first (the main name for my online world) and the specific name of the machine the software is running on in the second (something like monster8.scripting.com).
When the install is finished, it worked if you see an icon for Apache's popup in the WIndows system tray in the lower-right corner of your screen.
3. Change the root directory from htdocs in the Apache folder to something much shorter. I like to use C:\www. If you don't shorten this, all your file names are going to be very long and waste a lot of typing and visual space.