I tried to install and register Office:Mac Home & Student - but I entered the same product code that my husband had entered on his Mac Book Pro. I now need to know how to change the product code - I already have one to use that has not been used before. I have tried uninstalling - restarting - but with no luck. So if you see this Mac Book Pro at the bottom of the lake - that's why? Hugs to anyone who can help! Ok - so it is not the computer - it's the users...I still need HELP!