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Microsoft Office 365 Personal subscription, allows for you to install the FULL VERSION of Microsoft Office 2016 Applications. For example: PowerPoint, Outlook, Word, Excel, plus many more. But you can only install the full versions on ONE computer. Which i would assume you would want to install on the Dell.
You also get to install Full Versions of MSoffice2016 on ONE tablet, and ONE phone.
YOu also get access to all the ONLINE versions which do not INSTALL on your computer. They instead use your browser to operate. But you have to LOGIN to use them, so ONLY ONE person can be logged in at a time.
So, now that you know what is included in your subscription.....what are you trying to access?
DO you want to install the FULL VERSIONS? Or do you want to access the ONLINE version?