Developers with an active Visual Studio subscription (formerly MSDN) can download nearly every historical Microsoft OS, including 2008 R2, for development and testing purposes.

Historically, the Evaluation Center provided 180-day trials. While these links are often hidden or redirected to newer versions, some archived direct links from Microsoft’s Content Delivery Network (CDN) may still function for existing subscribers. 2. Visual Studio Subscriptions (formerly MSDN)

If you want, I can: