Windows System Assessment Tool

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The Windows System Assessment Tool (WinSAT) is a module of Microsoft Windows Vista, Windows 7, Windows 8, Windows 8.1, Windows 10, and Windows 11 that is available in the Control Panel under Performance Information and Tools (except in Windows 8.1, Windows 10, and Windows 11). It measures various performance characteristics and capabilities of the hardware it is running on and reports them as a Windows Experience Index (WEI) score. The WEI includes five subscores: processor, memory, 2D graphics, 3D graphics, and disk; the basescore is equal to the lowest of the subscores and is not an average of the subscores. WinSAT reports WEI scores on a scale from 1.0 to 5.9 for Windows Vista, 7.9 for Windows 7, and 9.9 for Windows 8, Windows 8.1, Windows 10, and Windows 11. The WEI enables users to match their computer hardware performance with the performance requirements of software. For example, the Aero graphical user interface will not automatically be enabled unless the system has a WEI score of 3 or higher. The WEI can also be used to show which part of a system would be expected to provide the greatest increase in performance when upgraded. For example, a computer with the lowest subscore being its memory, would benefit more from a RAM upgrade than adding a faster hard drive (or any other component). Detailed raw performance information, like actual disk bandwidth, can be obtained by invoking winsat from the command line. This also allows only specific tests to be re-run. Obtaining the WEI score from the command line is done invoking winsat formal, which also updates the value stored in %systemroot%\Performance\WinSAT\DataStore. (The XML files stored there can be easily hacked to report fake performance values.) The WEI is also available to applications through an API, so they can configure themselves as...