Installing Office Home & Student 2007 after trial expired

I am using Office 2003. Later on I had downloaded and installed Trail version of Microsoft Office 2007. Once the installation was done I found that somehow office 2003 was converted to trail. The setup has wiped out the activation key of Office 2003 and now both editions are trial. I am bit annoyed with the same. I went to add/remove and removed Office 2007 but still Office 2003 is trail. How can fix it back.

Do you have the cd or activation key of Office 2003. Just activate it once again. And it will be done. But if you are missing the cd and key then there are very few chances that you will get your key back. It would be complicated. First of all it never happens that when you install a new version of Office the old one is affected. Try to re-install and activate the same.