I had a failure in my Office 2003. I cannot go into repair it and I cannot remove it. I went through the office removal tool and it didn't work. I still have all my icons and I can still get into the programs but I get errors. I want to install a clean version of the software but it won't let me. I keep getting and "installation source not available" error. I retrieved my product key and put in the CD and tried to reinstall it and it doesn't like my product key. Is there any way I can fix this?