If you just can’t get your fingers away from those magical Emacs C-a and C-e keys and you’re using Windows a lot, XKeymacs might just be the thing for you:

XKeymacs is a keyboard utility to realize emacs like-useability on all windows applications. With XKeymacs you can use emacs keybindings with any windows application. You also get bash-like command completion in your DOS shell.

The only serious missing feature is the magical M-/ key (Dynamic Abbreviation), which is unfortunately one of the biggest reasons that I love Emacs so much. Even so, it’s pretty damn nice having those familiar keys available in Windows applications, from Notepad to Visual Studio.