Microsoft Office 2007 Enterprise 注册机下载，更换office序列号的方法可以看微软技术文档
http://support.microsoft.com/kb/895456

使用方法：
1. 关闭所有OFFICE 程序.
2.  编辑注册表：Start--------〉 Run----〉输入 regedit 然后 OK.
3.  找到并点击下列键:

For 2007 Office programs and suites:
HKEY_LOCAL_MACHINE \Software\Microsoft\Office\12.0\Registration
For Office 2003:
HKEY_LOCAL_MACHINE \Software\Microsoft\Office\11.0\Registration
For Office XP:
HKEY_LOCAL_MACHINE \Software\Microsoft\Office\10.0\Registration

Under the Registration subkey, there may be several Globally Unique Identifiers (GUID) that contain a combination of alphanumeric characters. Each GUID is specific to a program that is installed on your computer.

Click a GUID. Then, view the version of Office that is listed in the right pane for the Productname registry entry. After you find the GUID that contains the version of your Office program,

follow these steps:
a. Right-click the DigitalProductID registry entry, click Delete, and then click Yes.
b. Right-click the ProductID registry entry, click Delete, and then click Yes.