Summary: If there's something that puzzles or irritates you about Windows RT and you wonder why it's done that way, the answer is almost certainly battery life (or viruses).Why can't you run desktop applications on Windows RT? If you look back at the picture of Windows running on an ARM smartphone, way back when Microsoft began experimenting with moving the Windows code to the ARM chip, you don't see a WinRT app. You see Solitaire — a familiar desktop app. If the desktop, a Windows application, can run and if Office, a (significantly rewritten) desktop app, can run, then why not other desktop apps?Because they'd ruin your battery life — not