I purchased a new computer with Windows 8.1. I was using Windows 7. However, I did already have a Live.com account that I used when I did the initial setup on my computer. After I got the computer, I was deciding what to do about Office and after looking over purchasing new software, I decided to go with Office365 and at the same time get the OneDrive for Business offer which gives me a TB of storage. The problem is that now my computer is tied to my old Live.com account with OneDrive which only offer 15 mg of storage. How can I change my computer to use the my new Office365 account to get the TB of storage that I get with OneDrive for Business.