Step 1. Download the offline installer from your account portal To download the offline installer, go to www.office.com . If you're not already signed in with the Microsoft account associated with your copy of Office do that now. If you're signed in with a different account, sign out of that and then sign in again with the correct Microsoft account. Note: If you're trying to install Microsoft 365 that you got through your work or school and you already signed in with your work or school account, don't follow these instructions. Select the Office for business tab from above instead. Select Install Office. If you have a Microsoft 365 subscription, you'll also need to select Install Office > on the Installs page. In the Download and install window, select Other options. Check the box Download an offline installer and select the language you want to install Office in. Select Download. When you're prompted, from the bottom of your browser window, select Save (in Edge), Open (in Internet Explorer), Open when done (in Chrome), or Save File (in Firefox). The file will begin downloading on your PC. Once the download is complete, open File Explorer and locate a new virtual drive, for example (D:). This drive contains the Office installation files. If you don't see the new drive, locate the image file you downloaded and double-click it. The new drive should appear in your directory. Note: If you already have a drive labeled (D:), Office creates a virtual drive with the next available letter, which would be (E:) (as shown in the next step below). Save the image: You can also choose to save a copy of this virtual drive to a thumb drive or disc for later use. Step 2. Install Office Select the Office folder from the virtual drive and then double-click either the Setup32.exe to install the 32-bit version of Office, or Setup64.exe to install the 64-bit version to begin the offline installation. If you're not sure which version is right for you, see Choose the 64-bit or 32-bit version of Office. Select the virtual drive which may be named D or the next available letter When you see the message, You're all set, you can access your Office applications. After your Office installation is complete, you need to activate Office. Be sure you're connected to the Internet and then open any Office application, such as Word or Excel. In most cases, Office is activated once you start an application and after you click Accept to agree to the License terms. If you need activation help, see Activate Office. After activating Office and before you start using it, make sure you have the latest update. In any Office app, for example Word, open a new or existing document, then select File, > Account. From the Update Options drop-down list box, select Update Now. Answer from Lewis-H on reddit.com