推荐回答（1个）
什么情况下需要检测预装Win8/8.1电脑内置激活密钥（即Win8/8.1 OEM key）？
1、针对预装在品牌机中的Win8操作系统，因使用了某些软件或自己操作不当导致系统激活Key被替换而激活失效时，你需要找到内置在电脑中的OEM key，重新输入OEM key来激活系统。
2、针对预装Win8/8.1系统的电脑，当你想要重新安装同一版本的操作系统，但是所用的镜像是网友制作的多合一镜像，或者采用了某些”非主流”的安装方法，导致安装程序无法正确获取电脑内置Key而无法自动激活时，你需要找到内置在电脑中的OEM key，在系统安装完成后自己输入OEM key来激活系统。
3、针对预装Win8系统的电脑，想重新安装相同版本的Win8.1系统（比如，都是专业版）并使用内置的Win8 OEM key来激活Win8.1时，因为Win8.1安装程序无法识别Win8密钥，你需要找到内置在电脑中的Win8 OEM key，在安装完Win8.1后手动输入Win8 OEM key来激活系统。
预装Win8/8.1的电脑出厂时已经将系统激活Key内嵌到了电脑BIOS中（出厂时系统是未激活状态，系统会在连接网络的情况下会自动激活），但和预装Vista、Win7的电脑不同，预装Win8/8.1的电脑机身没有贴上印着系统激活密钥的标签。当然，你可以用一些常用的密钥查看工具查看当前系统的激活密钥，不过，这些软件读取的都是系统内部的激活密钥，如果你更换了密钥或者已经重新安装了操作系统，那么使用这些软件是无法获取预装系统的正版激活密钥的。这时候，就需要借助一些专用工具直接从电脑主板中读取内置Key了。这里介绍两个可以查看预装Win8/8.1电脑内置OEM key的工具:RW-Everything 和aida64。
用 RW-Everything 查看内置Win8/8.1 OEM Key方法
简单介绍：RW-Everything是Windows下一款可用于查看各类硬件信息的小工具。比如SMBIOS、PCI、IO、Bios、Memory等信息。另外还可以检测预装Vista、Win7电脑的Slic版本。最新版本的RW-Everything还可以检测出预装Win8电脑系统的激活密钥（即Win8 OEM Key）。
检测方法：首先下载对应版本的RW-Everything：32位版本 || 64位版本。解压后打开“rw.exe”程序，参考下图依次点击“ACPI”——“MSDM”选项。图中“Data”后面对应的字符就是电脑内置的Win8/8.1激活密钥啦。
用aida64查看内置Win8/8.1 OEM Key方法
首先下载aida64工具：点此下载。按照下图所示的步骤，以此打开主板————ACPI————MSDM，SLS Data后面的字符串就是内置Key啦。
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