Sometimes it happens. Scenario: During a Windows Office 2007 installation someone thought to shutdown the computer. In this case when you start again the Office 2007 installation, you will see a generic error and the setup will not continue.
I found an article that mentioned a Microsoft Knowledge Base with explained the error and the simple resolution. You have only to delete the rgstrtn.lck file!
In the Knowledge Base article, The 2007 Office suite Setup program will not restart after an initial installation is interrupted there is a detaileddescription with the cause and the workaround about this issue.
In case of some kind of issue and before send a new installation package on the computer, better read this KB srticle, delete the file and go ahead with the ususal installation.