from office 2003 to office 2007

[sister]

Hi when I purchased my computer office trials were on the computer office
2003 and 2007, I have vista, but when I purchased the office 2007 and tried
using the activation key it says its invalid, I then tried to uninstall all
versions of office from my computer but it refuses to uninstall. Any
suggestions?

 

[Peter Foldes]

For Office 2007

http://support.microsoft.com/kb/928218

For Office 2003

Have you tried to uninstall it with your Install Media