Check for Updates
Checks for available updates to your version of Office. If a newer version is available, you can choose to download the update. After downloading, if you have write permissions for the installation directory, you can install the update.
Once the download starts, you see a progress bar and three buttons on the dialogue box. You can pause and resume the download by clicking the Pause and Resume buttons. Click Cancel to abort the download and delete the partly downloaded file.
By default, downloads will be stored to your desktop. You can change the folder where the downloaded file will be stored in Tools - Options - Office - Online Update.
After the download is complete, you can click Install to start the installation of the update. You will see a confirmation dialogue box, where you can choose to close Office.
Under some operating systems, it may be required to manually go to the download folder, unzip the download file, and start the setup script.
After installation of the update you can delete the download file to save space.