從微軟Vista系統開始，微軟為系統引入了一項性能信息和工具功能，用來檢測系統體驗評分，這項功能可以用於簡單的電腦硬件性能的參考，一直延續Windows7，Windows8系統，但是到了Win8.1預覽版以及Win8.1正式版後，這項功能直接默認隱藏，不再直觀向用戶顯示。
為什麼說是隱藏呢?
因為系統體驗評分功能，就是WinSAT，用於Vista，Win7，Win8的性能信息和工具功能。而升級到Win8.1後，系統屬性裡面不再顯示系統體驗評分，但是WinSAT功能依舊存在於系統，支持將當前的系統評分分值直接以XML文本記錄。
如何找回當前的系統體驗評分信息?
方法一：適合高級用戶
一、win+X，選擇(以管理員身份)命令符，輸入winsat -help，可查看到和Windows系統評估工具相關的命令行用法：
二、繼續輸入winsat formal，啟動Windows系統評估工具
三：參考C:WindowsPerformanceWinSATDataStore路徑，直接查找XML文本記錄，默認有七個評分記錄，分別為CPU，Disk，DWA，Graphics3D，GraphicsMedia，Mem，Formal。其中Formal.xml是對系統體驗評分的匯總。
MemoryScore5.2對應內存RAM
CpuScore5.2對應處理器
GraphicsScore4對應圖形性能
Dx9SubScore4.2對應DX9性能
GamingScore4.2對應游戲圖形性能
DiskScore5.9對應主磁盤性能
方法二：適合普通用戶
原理：添加PerfCenterCPL.dll應用程序擴展到Win8.1系統Windows目錄下，並手動加載。即可在系統中添加一項性能信息和工具功能，直觀顯示Win8.1的系統各項指標的性能評分。
步驟：
1、下載PerfCenterCPL.dll應用程序擴展合集：
並復制system32和sysWOW64所有文件到Win8.1系統Windows目錄下，支持32位系統和64位系統。
2、復制以下內容，另存為PerfCenter.reg，導入注冊表，添加性能信息和工具功能
Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOTCLSID{78F3955E-3B90-4184-BD14-5397C15F1EFC}]
@="Performance Information and Tools"
"System.Software.TasksFileUrl"="Internal"
"InfoTip"=hex(2):40,00,25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,
6f,00,74,00,25,00,5c,00,53,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,
00,50,00,65,00,72,00,66,00,43,00,65,00,6e,00,74,00,65,00,72,00,43,00,50,00,
4c,00,2e,00,64,00,6c,00,6c,00,2c,00,2d,00,32,00,23,00,69,00,6d,00,6d,00,75,
00,74,00,61,00,62,00,6c,00,65,00,31,00,00,00
"LocalizedString"=hex(2):40,00,25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,
6f,00,6f,00,74,00,25,00,5c,00,53,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,
00,5c,00,50,00,65,00,72,00,66,00,43,00,65,00,6e,00,74,00,65,00,72,00,43,00,
50,00,4c,00,2e,00,64,00,6c,00,6c,00,2c,00,2d,00,31,00,23,00,69,00,6d,00,6d,
00,75,00,74,00,61,00,62,00,6c,00,65,00,31,00,00,00
"System.ApplicationName"="Microsoft.PerformanceInformationAndTools"
"System.ControlPanel.Category"=dword:00000000
[HKEY_CLASSES_ROOTCLSID{78F3955E-3B90-4184-BD14-5397C15F1EFC}DefaultIcon]
@=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,74,00,25,
00,5c,00,53,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,50,00,65,00,
72,00,66,00,43,00,65,00,6e,00,74,00,65,00,72,00,43,00,50,00,4c,00,2e,00,64,
00,6c,00,6c,00,2c,00,2d,00,31,00,00,00
[HKEY_CLASSES_ROOTCLSID{78F3955E-3B90-4184-BD14-5397C15F1EFC}InProcServer32]
@=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,74,00,25,
00,5c,00,53,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,73,00,68,00,
64,00,6f,00,63,00,76,00,77,00,2e,00,64,00,6c,00,6c,00,00,00
"ThreadingModel"="Apartment"
[HKEY_CLASSES_ROOTCLSID{78F3955E-3B90-4184-BD14-5397C15F1EFC}Instance]
"CLSID"="{328B0346-7EAF-4BBE-A479-7CB88A095F5B}"
[HKEY_CLASSES_ROOTCLSID{78F3955E-3B90-4184-BD14-5397C15F1EFC}InstanceInitPropertyBag]
"ResourceID"=dword:00000064
"ResourceDLL"=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,
00,74,00,25,00,5c,00,53,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,
50,00,65,00,72,00,66,00,43,00,65,00,6e,00,74,00,65,00,72,00,43,00,50,00,4c,
00,2e,00,64,00,6c,00,6c,00,00,00
[HKEY_CLASSES_ROOTCLSID{78F3955E-3B90-4184-BD14-5397C15F1EFC}ShellFolder]
"Attributes"=dword:a0000000
"WantsParseDisplayName"=""
3、復制以下內容，另存為WinSAT.Bat，批量運行，開始系統體驗評分測試。
@echo off
regedit /s PerfCenter.reg
regsvr32 /s "%SystemRoot%System32PerfCenterCPL.dll"
regsvr32 /s "%SystemRoot%System32WinSATAPI.dll"
regsvr32 /s "%SystemRoot%System32diagperf.dll"
regsvr32 /s "%SystemRoot%System32perftrack.dll"
regsvr32 /s "%SystemRoot%SysWow64PerfCenterCPL.dll"
regsvr32 /s "%SystemRoot%SysWow64WinSATAPI.dll"
4、運行後，打開控制面板，選擇小類別，即可找到“性能信息和工具功能”，打開即可顯示系統當前的系統評分內容。
▼終於找回隱藏的系統體驗指數
