Adrian was particularly surprised by the performance gains that he recorded post SP1 installation; his computer, a Quad core AMD Phenom computer with some impressive credentials showed significant improvements especially when it came to moving or extracting files.
Shuttling around single or multiple files around to and from an external USB drive - a common task if you transfer content, showed performance improvements between 150 and 175 percent, which can amount to several hours a year worth of savings if you are a video producer for example.
PC World's Melissa Perenson however encountered some slow down when it came to copying large files into a zip archive; something which is akin of compressing files although she tested SP1 informally, a disclaimer that she highlights in her conclusion.

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