Microsoft may call the newest version of its operating system Windows 7, but you may want to think of it as Windows 6.5. In overall look and feel, it mimics Vista, although there are enough changes to make it far more than just a juiced-up service pack. Overall, Windows 7 is a more functional, more efficiently designed operating system than Windows Vista, with far more attention paid to the user experience. From revamped a User Account Control (UAC) feature to better home networking, improved search and nice interface tweaks, the entire operating system has gotten an overall polishing. Even Windows Backup, one of the worst applications ever shipped with an operating system, has been turned into something useful.