Earlier this year, we found out that Windows 10 was going to be free on Raspberry Pi. Now, Microsoft's made the first Windows 10 previews for the little computer available to download.
The Windows 10 IoT Core Insider developer preview (phew) is now available, not just for Raspberry Pis but for other small devices too. Microsoft is the first to admit that this is a rough first cut though, so if you give it a try, be prepared for some bugs — and perhaps to let Microsoft know what goes wrong. [Microsoft via Engadget]