Tip 11. Reinstall Microsoft Office. If you still can’t activate your Microsoft Office, you can uninstall and reinstall it. Press Windows + R, type appwiz.cpl, and press Enter to open the Programs and Features window. Find and right-click your Office program and click Uninstall to uninstall Microsoft Office from your computer. I have Office Professional Plus 2016. I am signed into my Microsoft/office account, but it hasn't made a difference to thinking the product is licensed, it is the account I used to set up the program. I have misplaced the key, and none came in the email sent to me in 2016; I purchased the program through HUP in 2016. How to check if Microsoft Office is activated? Step 1: Open Office Word/Excel/PowerPoint. Click the File menu and then click Account. Step 2: On the right side, in the Product Information section, it will display Unlicensed/This product is unlicensed along with an option to activate the product if your Office is not activated. For example, Microsoft 365 isn't compatible with volume license versions of Office Professional Plus 2019 so you won't be able to install these together. For help with creating a valid deployment configuration, see config.office.com . 1. Close all Office applications. 2. Open the Control Panel and select "Programs and Features" or "Add or Remove Programs". 3. Find Microsoft Office 2019 LTSC in the list of installed programs and select it. 4. Click on "Uninstall" and follow the prompts to complete the uninstallation process. tl:dr - Microsoft says my copy of pre-installed Office apps is not activated after I reset my laptop due to issues. My laptop (Lenovo Ideapad L340 Gaming) came pre-installed with Microsoft Office Professional Plus 2019. Due to performance issues I had reset my laptop more thrice, and this never affected Microsoft Office in any way. The site displays what it says is the Product Key that I should be able to use to activate Office 2016. It also displays a button for me to download Office 2016 onto my new computer. The download worked and the install program apparently worked. Then Office wants to be activated. The choices offered are to activate it online or by telephone. Generally, this issue may be caused by an activation key for Office Professional Plus 2019 existed on your computer. I suggest you try following steps to check Office activation information. Search CMD, right-click the Command Prompt and run as administrator. Then copy and paste the command below in it, click Enter at last: Eh2Yd.