problems installing office 2003

[DocMartin]

PLease can someone help!

I am trying to install a valid professional Office 2003 copy and I get the message "invalid product key." I already have Office 2000 installed. Do I need to remove it? I am rather afraid to remove it because maybe I won't be able to reinstall it either. And then I will be without any office product. I use the Word quite a bit and don't want to be without it.
Also, the first time I tried to install the Professional Office 2003, the key was accepted. However, I had some conflicts, so I removed it and tried to reinstall it. This is when I got the message that the key was invalid. A friend of mine tried it on his computer and the key was accepted. What is my problem! The cd is a legal copy from a University where my son attends.
Thanks for any help that anyone can give.

DocMartin

[Martoch]

Must be a common problem.
http://support.microsoft.com/default...b;en-us;836178

A few Google search results revealed people needing to try the key close to 10 times before it will be accepted.

[DocMartin]

Thanks for your quick reply! I'll keep trying.

[DocMartin]

I still need help. I've tried over and over many many times to install the office 2003 and the key will still not work. I even removed my old office 2000 and that did not work either.
Thanks ahead of time to anyone who can help.

[jrsweger]

If your friend installed your copy on his computer, and activated it, you are going to get grief from Microsoft whenever you finally get yours loaded on your machine anyway.

I would suggest calling Microsoft. If you've only ever installed it on the one machine (besides your friends), they should help you out.