In the past it too hours to install or upgrade an operating system. According to St. Pierre, a clean install -- where all files and data are wiped from the drive prior to installing Windows 8 -- should wrap up in 21 minutes, 35% less time than the 32 minutes Microsoft said it takes Windows 7 to do the same. For what Microsoft called a "medium upgrade," one on a PC with 213,000 files and 77 applications, Windows 8 is three times faster, finishing the upgrade in just 42 minutes, versus Windows 7's two hours and 11 minutes.

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