Windows comes with a large chunk of fonts that are already good enough for most of people for their daily needs. But they are also way too less for anyone who is doing serious creative work like presentations, photos, designs, etc.. A much larger fonts collection is definitely needed and welcomed, as always.
Rich from Windows Guide has put together a total of 769 fonts he collected over the time and generously uploaded onto his own server for sharing. All applicable licenses and credits are included in this megapack for the authors who worked so hard creating these fonts. All fonts are for Windows only.
To install, just extract all fonts from zipped Megapack into a folder, and right click on them to install into your windows. Or, you can temporarily load them without installing them by a tool called Font Load Unload.