Q. Is there a central repository of all Microsoft EULAs?

A. Seriously, you want to read it again?  If you're one of those people who just accepts the EULA without reading it, Microsoft has all its EULAs on this site. Select the product, version, and language and the EULA will be available as a PDF. You can also just run the winver command in Windows—it has a link to the EULA for the product you have installed.