During the 1970s and 80s, the transition from green-screen terminals with the mainframe to decentralized PCs meant performance enhancements in multimedia, lower hardware costs and mobility of information technology resources. However, the consumers discovered that the benefits of personal computers were often outweighed by the costs of management and maintenance. Businesses and organizations have discovered that there are significant, downsides with the decentralized PC computing approach. Evaluations reveal that more than 70 percent of the total cost in a desktop computing is focused on equipment purchase, deployment, repair, maintenance, upgrading and replacement. Studies have also determined that desktop resource utilization rates are alarmingly low, and that an abundant amount of hardware capacity sits idle for prolonged periods. Overall, while capacity utilization on Windows/Intel servers is generally only between eight and 15 percent, for the desktops accessing those servers, it is a paltry three to five percent.To address this issue of improving capacity utilization, more and more companies and information technology departments are implementing infrastructure solutions, such as server and storage consolidation through virtualization. Companies are taking a “return-to-the-mainframe” mentality, leveraging these same solutions, and in many cases, the same IT skills, to re-deploy desktops. Virtualization, is of immense use to SMEs (Small & Medium sized Enterprises.) to optimize System resources ,that too in the most cost effective way. The entire desktop operating system and application stack can be virtualized, delivering the complete multimedia experience that users have become accustomed to, but without the security concerns and spiraling management costs of the traditional "fat client" PC approach.

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