I downloaded the current version at the time and clicked through the install steps, which were pretty straightforward. However, when I started WAMPServer and tried to enter “localhost” in the browser, I did not see the default PHP index page. After some searching in the WAMPServer forums, I found that if Skype is installed, that can tie up port 80. I tried unchecking the box for port 80 in Skype options in my installation, but still did not see anything when I entered localhost in the browser. Finally, per this Wampserver forum post, I saw that it should be possible to change the Apache port to port 8080 instead of 80. I edited httpd.conf (at C:\wamp\bin\apache\Apache2.4.4\conf in my install) and changed the port listening to 8080 as follows:
# Listen: Allows you to bind Apache to specific IP addresses and/or
# ports, instead of the default. See also the <VirtualHost>
# Change this to Listen on specific IP addresses as shown below to
# prevent Apache from glomming onto all bound IP addresses.
After that, http://localhost:8080 worked! The WAMPServer documentation should be updated to make it easier to correct this problem.