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?