The instructions for this depend on which version of Windows you're using: Windows 10

Follow through the instructions until your version of Office has been updated with all the latests patches and service packs (e.g.Visit the Microsoft Update page for instructions on how to run Windows update on your particular machine (typically via 'Windows Update' in the Windows Control Panel).Make sure that Excel is closed (ideally you will have rebooted your computer so that Excel hasn't even been opened yet in your current Windows session).This should be the same process as updating Windows, as Microsoft has merged the two: It's best to reboot your computer before starting an update or repair, to reduce the chances of a running program preventing files from being repaired or replaced. Updating and repairing Excel will often fix things.įollow the steps below – first update, then repair. To reactivate your Office applications, reconnect to the Internet.If an Excel add-in is acting peculiarly (or not at all), it's often because Excel is broken in some way.

If you don’t connect to the Internet at least every 31 days, your applications will go into reduced functionality mode, which means that you can view or print your documents but cannot edit the documents or create new ones.

You should also connect to the Internet regularly to keep your version of Office up to date and benefit from automatic upgrades. Internet access is also required to access documents stored on OneDrive, unless you install the OneDrive desktop app. For Microsoft 365 plans, Internet access is also needed to manage your subscription account, for example to install Office on other PCs or to change billing options. However, Internet access is required to install and activate all the latest releases of Office suites and all Microsoft 365 subscription plans.

You don’t need to be connected to the Internet to use Office applications, such as Word, Excel, and PowerPoint, because the applications are fully installed on your computer.

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