This may be the case that some files in the system are missing, usually in the installation of a ghost version or a streamlined system
Open C:\WINDOWS\msagent
See if the contents of the folder are as follows:
Then open C:\Program Files\Common files\microsoft Shared\Web Serverextensions\40\bin
See if it looks like the following:
If the test finds that the file is missing, you can download Office2003miss
or download directly from the following address:
Http://202.199.155.5:1127/uploadfile/office2003miss.rar
After extracting the missing files into the corresponding directory (PS: in C:\Program files\common files\microsoft Shared\Web Serverextensions\40\bin file only three files, In capital letters files are generated after Office is installed, don't worry about them)
Description: The download package after decompression contains multiple files, according to the above 2 picture comparison, their lack of what to put, do not have to put in all.
Acknowledgement: Http://zhidao.baidu.com/link?url=ZK6ZtF_KdA1P7YfkFx6lZ8rZ3dRZTNHSHSDTB4mwH9lS5Z3mv6Mq-9FZRdEvDMS1odZMKZkUUZ8sA0gWuTB3xa
Office cannot install "Windows Installer service cannot update one or more protected Windows files"