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Vista之家（www.vista123.com）：效仿Vista SP1，Win7 SP1也是修改注册表提前升级
同Vista时代的SP1、SP2等Service Pack包的发布形式类似，Win7 SP1 Beta（注意是Beta）的发布也是可以先通过修改注册表键值，从而实现让Windows Update （Windows自动更新程序）来“找到”，从而实现下载和升级的目的。修改注册表键值是为了“迷惑”Windows7，告诉系统我们有权先体验Win7 SP1，这算是微软开的后门吧。
虽然，刚才我们提供了真实的注册表项和键值的格式和名称，但是这个键值（注册表的Key）的内容现在依然不得而知。同Vista一样，这个键值的内容肯定是一个GUID，感兴趣的朋友继续等待，隔不了多久了。
Key: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\WindowsUpdate\Win7SP1
Value: SPORTM (REG_SZ)
Data: Unknown (likely a server-side checked GUID)
关于Win7 SP1相关的英文资讯原文说明：
Microsoft prepares Windows 7 for external SP1 testing
Similar to previous external beta service pack rollouts, Microsoft has enabled – via updates you already installed – a beta ‘candidacy check’ within its Windows Update software. Just like Windows Vista, a registry key and value pair need to be added prior to being authorized to download the new software.
Although I’ve documented the required key and value names, the value’s data (likely a GUID as before) remains unknown. The takeaway here is that external Windows 7 SP1 testing should commence soon, if it hasn’t already. Tips regarding the significance of the name SPORTM would be greatly appreciated.
Key: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\WindowsUpdate\Win7SP1
Value: SPORTM (REG_SZ)
Data: Unknown (likely a server-side checked GUID)
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