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Microsoft 365 and Office | Microsoft 365 Defender | For home | Windows
An integrated threat protection solution designed to detect, investigate, and respond to cyber threats across Microsoft 365 services.
Hi! AaronNeedsHelpAlot,
Welcome to the Microsoft Community! I realize that you want to know how to start Microsoft Defender and I understand how you feel. First of all, let me explain to you that to use Microsoft Defender, you need to have a Microsoft 365 Personal or Home subscription, and you need to have the corresponding version of Office Suite installed on your computer, Microsoft Defender will be installed on your computer along with the Office Suite.
Once you have met the above criteria, you can look for it in your start menu. (Or you can press Win+Q to open the search box > type Defender)
For detailed instructions on how to install Defender please refer to the link：Installing Microsoft Defender - Microsoft Support
For instructions on how to get started with Defender, please refer to the links below.：Getting started with Microsoft Defender - Microsoft Support Feel free to post back if you need further assistance.Thank you for your understanding and patience and I look forward to hearing from you. Best Regards Eddy | Microsoft Community Support Specialist