Go to apache.org and get Apache (either 1.3.x or 2.0.x), then go to php.net and get the latest zip install version. The Apache install will be point and click, and the php zip file comes with a very good set of instructions. You could also use IIS but if you don't have Windows 2000 Server it's not installed by default so I would suggest Apache, which even if you have Windows 2000 Server I would suggest disabling IIS and installing Apache.