Hi there, I too have the same problem trying to install Office 2003 on a Laptop running Win10. I get the option to activate over the Internet, am then told this option is no longer supported and I should acivate by phone. I click on this option to be told that this option is no longer supported.
I contacted Microsoft by way of "Microsoft Answer Tech", spent an hour explaing the problem, got the impression I was the first to have this problem and nobody knew how to resolve it. The person dealing with me said she had passed it up to her managers and they would contact me shortly with their response.
Needless to say I am still waiting and have resorted to you good people to help me out.
I am in the UK and the toll free number given in this post does not work.
Any help would be greatly appreciated.