I thought that the Windows Experience Index was pretty useless until I wanted to compare the speed of systems that I was preparing to donate. One had Windows 7, the other was a lab PC running Windows 8.1. I was surprised to find that I could not find the Windows Experience Index (WEI) on the Win 8.1 computer. The WEI is calculated by Windows using the Windows System Assessment Tool (WSAT), (see: http://en.wikipedia.org/wiki/Windows_System_Assessment_Tool for a good overview). The attached script requires PowerShell 3, and so run natively on Windows 8 and 8.1. What it does is permits you to see your current WEI for your Windows 8.1 computer. This is written for people with an understanding of PowerShell. If you have your execution policy set to unrestricted, you may find that Get-WINSATScore.ps1 is easiest to run from the ISE.