Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
(note: your info line says Office 2010, while body says 2016. Which is right?)
No need to buy a new license. All office licenses give you the right to run 32 or 64 bit Office as required.
You will have to uninstall your current 32 bit Office, then go into the MyAccount site and dig down to find the 64 bit installer. It is on the same page as the Offline and 2013 installer download options.
Roll Back 2016 to 2013 manually by USER! DownGrade - Down Grade - Back out
How do I use the Office 365/2016 offline installer? Downgrade to Office 2013http://office.microsoft.com/MyAccount
https://support.office.com/en-us/article/How-do-I-use-the-Office-2016-offline-installer-f0a85fe7-118f-41cb-a791-d59cef96ad1c Offline installer
Looking for help with a one-time purchase of Office 2013 or Office 2016?: Download the install files for a one-time purchase of Office 2013 or Office 2016
- installer options, including downgrade
https://support.office.com/en-US/article/How-do-I-reinstall-Office-2013-after-an-Office-2016-upgrade-a6ca92f4-cbb4-4609-9fdb-f8d3dd6812f3 How do I reinstall Office 2013 after an Office 2016 upgrade?
If you need to install Office 2016 without an active Internet connection, or if you're having problems with slow speed or tenuous connections, you can download the offline installer file and then install Office 2016 at your convenience. Go to the Wiki link above for instructions with pictures
Start on the On the My Account page, choose Install.
Choose Language and install options.
Choose Additional install options.
Choose Download offline installer.
After you see a prompt to open or save the offline installer file, choose your preferred option.
If you choose Open, the file will download. Once the download is complete, you'll see a new virtual drive D that contains the Office installation files.
Note If you already have another drive labeled D, Office will create a virtual drive with the next available letter.
If you choose Save, you can specify where you'd like the image (.IMG) file to be saved. For example, you can save it to your desktop or to a USB drive. On Windows 10 and Windows 8 machines, you can open the file directly. If you use Windows 7, you'll need to copy the image file to a disc before you can open the file and continue to step 6.
Launch setup.exe to begin the offline installation. When you see the message, You're all set, you can now access your Office applications.
The first time you run one of your Office applications, you'll receive a prompt asking you to enter your product key to activate the product. Since you already have a Microsoft account that's associated with Office, choose Sign in with an active account instead.
Enter your email address, and then choose Next.
Note Make sure the email address and Microsoft account you use is the same one you used previously.
Enter the email address and password associated with your Microsoft account, and then choose Sign in to start using Office.
For more information about installing Office, see Download and install Office 365 Home, Personal, or University on your PC.
Looking for help with a one-time purchase of Office 2013 or Office 2016? Associated with email Account - Offline Installer
Download the install files for a one-time purchase of Office 2013 or Office 2016
Download the install files for a one-time purchase of Office 2013 or Office 2016
Looking for Office 365 help?: How do I use the Office 2016 offline installer for Office 365?
If you made a one-time purchase of Office 2013 or Office 2016 (not a subscription to Office 365), you can download the install files directly to your computer.
Important Downloading the install files can take quite a while. Please be sure your computer stays powered on and connected to the Internet while downloading.
Sign in to your My Account page.
Choose Install from a disc.
Choose I want to burn a disc, and then choose Download.
Save the installation file to your computer and then run it to install Office.
**Applies To:**Office 2013, Office 2016