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What is Microsoft Office Error Code 12002-28 Error Code 12002-28 is a common error code for the Microsoft Office suite while you activating or downloading the Office suite. Sometime it will also pop due to office suite updates and installation. Microsoft Office Suite application is one of the very important applications your windows operating system to do regular day-to-day works like for studies, business, and personal works, etc. And as it is a development era Microsoft has launched the well developed and secured products such as Office 365 and Office 2019 and also Office 2016 which was preceded by Office 365 and Office 2019. You could buy the Office product from the Microsoft product list or store (products.office.com). And in some cases, the Microsoft Office installation or update may end up with Error Code 12002-28. How to Fix Microsoft Office Error Code 12002-28 Follow the below steps to fix this error: Step 1: Temporarily disable Firewall and Antivirus Error Code 1