by Luis de Vasconcelos.
Windows 8 OS is not a server operating system. Installing Moodle on a desktop computer with a desktop operating system is probably just asking for trouble... You're better off using a server operating system.
Microsoft Webmatrix will be 'ok' as a starting point - but it's not designed for large scale production environments, so you'll have to tune it at some stage.
How many students do you have? And how many of them will he accessing the Moodle site concurrently? Knowing that is necessary in determining if your server requirements...