Windows 10 is a great operating system, but it’s also very easy to get in trouble with it. There are hundreds of thousands of programs and apps out there, and some of them are malicious or just plain bad. Windows 10 has a built-in app that will help you to keep track of all your installed apps, and uninstall any that you don’t want anymore. It will also let you know if there are any programs that you have downloaded from the internet that are actually malware or viruses. This app is called Windows Defender, and it’s available in the Windows Store.