Before starting the download, completely uninstall any older versions of Microsoft Office (such as Office 2016, 2019, or pre-installed Microsoft 365 apps) from your computer. Having multiple versions of Office on one machine can cause critical licensing conflicts. Open on your Windows PC. Go to Apps > Installed Apps .
After signing in, you will be asked to enter your 25-character product key. Type it in exactly as it appears. This step links the product key to your Microsoft account for life, which is important for future installations and managing your license. microsoft office 2021 professional plus -pc- download
When you purchase the software from a licensed retailer, you will receive a 25-character product key. It might be on a card inside the box, in a digital email, or on the receipt. Keep this key handy. Before starting the download, completely uninstall any older