How to Create a Protected Method in a Sealed Class in C#?

Can't be done and in fact doesn't make sense; given that a sealed class cannot be inherited. Similarly, it makes no sense to create an abstract method in a sealed class. Sealed classes can inherit from other classes though.

File History in Windows 8

Windows attempt at a versioning file system.

Hacking the Path Variable in Windows 8

Hit the Windows key - then type Control Panel.
In Control Panel search, type Path.
(The edit the path, making sure you click OK when you exit the Screen).

Deciphering Interactive Services Detection

Interactive Services Detection is the software that comes up with the cryptic message: "A program running on this computer is trying to display a message". It is actually a Windows service named UI0Detect.

The Two Sets of APIs to Build Windows Runtime Apps

These APIs are Windows Runtime and WinJS.  The latter enables you to build HTML/JavaScript applications with equivalent functionality to XAML (specifically the Windows.UI.Xaml namespace equivalent functionality).

WinJS.Application provides application level functionality such as activation, storage and application events. When you create a new Windows JavaScript application, you'll see this namespace referenced in the default.js under the js folder of your solution.

Windows 10

Windows 10, the next version of Windows, can be previewed via the Windows Insider Program.

Starting Visual Studio Express on Windows 8

Go to Search and type in VS. This will find Visual Studio Express.