Registration is required if you initiate the download of Windows Server 2008 R2 SP1 through MSDN, TechNet or Microsoft Download Center. Microsoft offers the free evaluation to both IT professionals and developers via TechNet and MSDN, and hence there are two download links for the exactly the same file sets. Note that Windows Server 2008 R2 with SP1 is available in 64-bit (x86) versions only.

Another ISO is available for Windows Server 2008 R2 SP1 Itanium for English, German, Japanese and French.

Windows Server 2008 R2 with SP1 evaluation edition is available in a single DVD ISO disc image format for Windows Server 2008 R2 SP1 Standard, Enterprise, Datacenter and Web editions, and is available for English, German, Japanese, French, Spanish and Chinese (Simplified). But activation has to be done within 10 days activation grace period, but user can rearm up to 5 times for additional activation grace period. The ISO image will install the Windows Server 2008 R2 with SP1 with an embedded product key which expires after 180 days. The trial or evaluation version of Windows Server 2008 R2 with SP1 comes with 180 days of free usage period, which means it can be used for free without purchasing or paying for half a year. With the release of SP1 for Windows 7 and Windows Server 2008 R2, the evaluation version of Windows Server 2008 R2 has also been updated by slipstreaming and integrating with the service pack.

Windows server 2008 r2 sp1 download