Windows 95 had a lot going for it: its iconic startup sound; its soothing teal background; Internet Explorer in its earliest, purest form; and my personal favorite, the Paint program. Today, if you’re ever feeling particularly nostalgic, you can run Windows 95 in your browser. (True to history, attempting to use Internet Explorer will cause the emulator to crash.) But the emulator reveals a conspicuous absence: no Instagram. Yes, Instagram only launched in 2010, and as a free mobile app rather than a Windows 95-friendly .exe program. But what if it had come into existence two decades earlier? Russian graphic…