O Windows 10 On the Windows 10 task bar, type Control Panel in the Type here to search box, select Control Panel in the search results, and then select Programs and Features. Open Control Panel using the steps below for your operating system: Let's uninstall any versions of Office you aren't using before we continue to troubleshoot.ġ. Step 2: Check for multiple copies of OfficeĪctivation can fail if you have multiple copies of Office installed. If it's not, your email address won't work for signing in to Office. Your Office product or Office 365 subscription should be listed there. To check if your Microsoft account is associated with Office, sign in to Services & subscriptions. If you're at work or school, you may need to log in using your work or school account instead of your personal email account. Please try signing in using all your personal email addresses in case you bought Office using a different email address. To restore all features of Office, you'll need to fix the problem that's causing activation to fail. If Office activation fails, you'll see Unlicensed Product or Non-commercial use / Unlicensed Product in the title bar of your Office apps, and most features of Office are disabled. When clicking 'Additional licence data' I DO get a warning against an alarmingly pink background: 'Activation required'. However, my fiddling must have helped somewhat as next day everything seemed alright again: no error messages when starting any Office application and when clicking 'Account' I see the reassuring text 'Product Activated'. (First it was 'this code is already registered, then 'not a valide product code'.) I tried to activate it, but this proved impossible. After years of use, my MS-Office 2013 suddenly claimed to be not yet activated and threatened to stop working.

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