Hi,
I will try to help you sign-in to Office.
I would like to know more information to help you better.
How is the internet connection setup for the computer (Wired, Wireless or via a Router)?
Does the issue occur only with the Word application or other Office applications as well?
Do you have any security application installed on the computer?
Provide more information to assist you better.
You may sign-out of Office completely and then try to sign-in back again and check if the issue occurs.
Right click on any of the application and choose
Run as Admin and then open the apps, sign-in and then check if the issue occurs.
If the issue persists, you may remove the stored credentials following these steps and then re-login and check if the issue occurs:
-
Open User Accounts by
clicking the Start button , go to
Control Panel, click
User Accounts and Family Safety (or click User Accounts, if you are connected to a network domain),
and then clicking User Accounts.
-
In the left pane, click
Manage your credentials.
-
Click the vault that contains the Live account credential.
-
Click the credential, and then click
Remove from vault.
Now sign-in to Office again and check if the issue occurs.
Let us know the required information and hope the suggestions provided are helpful.
Thank you.