HKY_LOCAL_MACHINE下SOFTWARE\\Microsoft\\Microsoft SQL Server\\90\\Tools\\Setup\\  version = 9.00.1399.06(类型为REG_SZ)  和SP = 3(类型为REG_DWORD)
注：如果是890安装在SQL2008下还需要加
HKY_LOCAL_MACHINE下-SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\{147D95C4-1734-4FEE-A3E4-EDB76FAE02EA}

NETframework判断
1、首先版本对不对确定？  %windir%\Microsoft.NET\Framework\v2.0.50727\System.Windows.Forms.dll的版本〉=2.0.50727.1433。
2、HKY_LOCAL_MACHINE下\\Software\\Microsoft\\NET]\\Software\\Microsoft\\NETFramework Setup\\NDP\\v2.0.50727  Install = 1