从微软Vista系统开始，微软为系统引入了一项性能信息和工具功能，用来检测系统体验评分，这项功能可以用于简单的电脑硬件性能的参考，一直延续Windows7，Windows8系统，但是到了Win8.1预览版以及Win8.1正式版后，这项功能直接默认隐藏，不再直观向用户显示。
为什么说是隐藏呢?
因为系统体验评分功能，就是WinSAT，用于Vista，Win7，Win8的性能信息和工具功能。而升级到Win8.1后，系统属性里面不再显示系统体验评分，但是WinSAT功能依旧存在于系统，支持将当前的系统评分分值直接以XML文本记录。
如何找回当前的系统体验评分信息?
方法一：适合高级用户
一、win+X，选择(以管理员身份)命令符，输入winsat -help，可查看到和Windows系统评估工具相关的命令行用法：
二、继续输入winsat formal，启动Windows系统评估工具
三：参考C:WindowsPerformanceWinSATDataStore路径，直接查找XML文本记录，默认有七个评分记录，分别为CPU，Disk，DWA，Graphics3D，GraphicsMedia，Mem，Formal。其中Formal.xml是对系统体验评分的汇总。
MemoryScore5.2对应内存RAM
CpuScore5.2对应处理器
GraphicsScore4对应图形性能
Dx9SubScore4.2对应DX9性能
GamingScore4.2对应游戏图形性能
DiskScore5.9对应主磁盘性能
方法二：适合普通用户
原理：添加PerfCenterCPL.dll应用程序扩展到Win8.1系统Windows目录下，并手动加载。即可在系统中添加一项性能信息和工具功能，直观显示Win8.1的系统各项指标的性能评分。
步骤：
1、下载PerfCenterCPL.dll应用程序扩展合集：
并复制system32和sysWOW64所有文件到Win8.1系统Windows目录下，支持32位系统和64位系统。
2、复制以下内容，另存为PerfCenter.reg，导入注册表，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、复制以下内容，另存为WinSAT.Bat，批量运行，开始系统体验评分测试。
@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、运行后，打开控制面板，选择小类别，即可找到“性能信息和工具功能”，打开即可显示系统当前的系统评分内容。
?终于找回隐藏的系统体验指数
