Are you unable to use an Office application? The main reason behind this could be the expiration of the subscription. But, if the subscription is active or not expired and you are not able to open Excel, Word or any other application then you need to repair it using the right procedure. Fortunately, you can do this on your own by following the instructions given below:
- Right-click on the Start button
- Choose apps and features and search for Office 365 (complete package) app
- Click modify and then choose Online Repair
- Hit Repair
- This will automatically repair the issues and make your Office 365 subscription (available at office.com/setup) run like new!