How to Run an App as Administrator in Windows 10
Windows 10, like all Windows versions since Windows Vista, includes User Account Control or UAC which limits the user's rights even if he is a member of the Administrators group so that malicious apps or malware can't make unauthorized changes to your PC.
How to Prevent Access to Registry Editor in Windows 10
Registry Editor is an essential tool for system administrators, geeks and regular users who want to change the Windows operating system's hidden settings which are not available via its user interface. You might want to prevent users from accessing Windows Registry, and from making its modifications. In this case, you can enable a group policy.
Windows Defender is the built-in security solution in Windows 10. It provides basic protection against threats. In recent Windows 10 builds, Windows Defender is part of Windows Defender Security Center. This post explains how to reliably disable Windows Defender in Windows 10.
User Account Control, or just UAC is a part of the Windows security system which prevents apps from making unwanted changes on your PC. When some software tries to change system-related parts of the Registry or the file system, Windows 10 shows an UAC confirmation dialog, where the user should confirm if he really wants to make those changes.