Windows 7 a successor of Windows Vista is about to get first major upgrade. Although Microsoft has kept a mum about the development and changes in Windows 7 SP1, third party peoples have managed to get their hands on Windows 7 SP1 screenshots.
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Microsoft is testing out Windows 7 SP1 beta version with limited number of people close to company. The first RC is yet to be released officially. There is no announcement from Microsoft, but it is assumed that Windows 7 SP1 will be available in first half of 2011 which of course is subject to change.