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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).<ref name="Microsoft_Perfect_Score"/>
Detailed raw performance information, like actual disk bandwidth, can be obtained by invoking <code>winsat</code> from the command line. This also allows only specific tests to be re-run.<ref>[http://windowsitpro.com/systems-management/winsat-command-line-utility Winsat Command-Line Utility]</ref> Obtaining the WEI score from the command line is done invoking <code>winsat formal</code>, which also updates the value stored in <code>%systemroot%\Performance\WinSAT\DataStore</code>.<ref>[http://windowsitpro.com/systems-management/how-can-i-run-windows-system-assessment-tool-winsat-update-directly-command-line How can I run the Windows System Assessment Tool (WinSAT) update directly from a command line?]</ref> (The XML files stored there can be easily hacked to report fake performance values.<ref>[http://www.howtogeek.com/71500/stupid-geek-tricks-hacking-the-windows-experience-index/ Stupid Geek Tricks: Hacking the Windows Experience Index]</ref>) The WEI is also available to applications through an [[API]], so they can configure themselves as a function of hardware performance, taking advantage of its capabilities without becoming unacceptably slow.<ref>{{cite web |title=Windows Experience Index: Overview |url=
The Windows Experience Index score is not displayed in [[Windows 8.1]] because the [[graphical user interface]] for WinSAT was removed in this version of Windows, although the [[command line]] winsat tool still exists and operates correctly.<ref name="WEI killed">{{cite web| url=http://www.cnet.com/how-to/find-your-windows-experience-index-scores-in-windows-8-1/| title=Find your Windows Experience Index scores in Windows 8.1 | author = Ed Rhee |
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