Windows Server 2008 R2 Enterprise Edition provides you with high levels of system uptime and the scalability to support the growth of mission-critical applications. It also provides a cost-effective way to realize the benefits of virtualization.
Providing uninterrupted business services to employees, vendors, and partners around the clock has become a critical business factor for global businesses. Remote employees and international customers and partners need to have continuous access to systems and data. A disruption in services can result in diminished productivity and lost opportunities.

Benefits
Windows Server 2008 R2 Enterprise provides high availability for mission-critical applications such as databases, messaging systems, and file and print services through such features as failover clustering and the Server Core installation option. It also includes Hyper-V, a flexible high-performance hypervisor for cost-effective virtualization.
High Availability
Failover Clustering
Windows Server 2008 R2 Enterprise provides robust, rapid failover clustering that is easy to manage and automatically takes action in the event of a failed server, maintaining service so that users experience minimal disruption. Failover clustering in Windows Server 2008 R2 Enterprise supports up to 16 nodes. Combined with third-party replication products, multi-site clustering is also possible.
Server Core
Server Core, a minimal installation option for Windows Server, only the essential capabilities for a given workload are installed, resulting in a more reliable, secure server that is optimized for running the most demanding applications and services, and that requires less patching and servicing.
[N.B.] Up-To-Date With Important Update & Hotfixes From December 2011.
Installation Instructions
Use Your Favourite Iso Burning Program
To Burn Or Mount The .iso File, EX. Poweriso Or UltraIso
Burn Speed Should Not Be Max Or The Lowest, Burn At Medium Speed,
Install And Follow The Instructions By The Windows Setup Disc.
No Activator,Patch,Crack, Or Serial Needed, Its PreActivated
[N.B.] If Pre-Activation Should Fail For Any Reason Browse
And Open The Folder [ Emergency Activator (C.R) ]
Done Enjoy !!! .