The updates for the entire Microsoft Office package are distributed through the Windows Update program. This means that in order to update it, you need to launch Windows Update first. Go to Start > Control Panel > System and Security > Windows Update. Make sure that you are connected to the Internet then perform a manual check for updates. The Office updates will be listed when you click the more details button. Based on the size of updates and Internet speed, the process can take from a few minutes to 1-2 hours maximum.