Thanks for getting in touch, and sorry you are having problems. The first thing to know is that there is an online demo you can try with no installation and complete freedom:
Hi Ravi
its short for Unix, though that really means Linux these days, such as Debian, Ubuntu, Redhat etc. I always use XAMPP under Windows, but I suspect WAMPP uses the same components it should work. If I can I will look into Gibbon with WAMPP…
OK, seems there was some old code left in there that WAMP does not like. It was not serving any purpose, so I have pruned it, and that will go into the v9 release, Q1 2015.
For now, assuming you are using v8.3.00, please can you open the file /installer/install.php in a text editor. There are three lines that contain the code $_SESSION. Please find these using the search function in your editor, and remove the 3 lines entirely (one line per occurrence). Once this is done, refresh your page, and see if it works OK.
You are keeping us busy! Sounds like you are serious about Gibbon. We have a limitation here, which is that we can currently only support currencies supported by PayPal (https://www.paypal.com/multicurrency). Is this a major issue for you? Ross