Microsoft gave developers their first hands-on experience with the upcoming Windows 7 operating system Tuesday. Set for release in 2010, the version of Windows 7 shown at the company’s Professional Developers Conference refines certain aspects of the company’s Windows Vista OS and is designed to improve on performance. “The best way to think of Windows 7 is to look at it as an improved version of Windows Vista,” said Al Gillen, an IDC analyst, told TechNewsWorld.