wf4bk wrote:[color=blue]
> I'm having all kinds of problems installing Offfice 2007 on a Windows Vista
> 64 bit Ultimate operating system. I've tried copying the CD to a file and
> tried downloading the free trial from the web. I've also re-installed the
> opertaing system but nothing seems to work. Most of the error messages are
> "digital signature does not validate or is not present." While I've got a
> ticket open with Microsoft, they haven't been much help so far."
>
> Anybody got some suggestions or having the same problem?
>
>
>
>
>
>[/color]
Runs perfectly on both of my x64's (XP Pro & Vista Ultimate).
Try this:
Delete all temp files.
Dl and install Windows Install Clean Up.

[url]http://support.microsoft.com/kb/290301[/url]

Run the utility and use it to remove all instances of Office 2007.
Reboot and try to install again.
Frank