IE has dealt with different architectures since its very beginning, as has Windows. Recall that Windows so far ran on x86, x86-64, IA64, DEC Alpha, MIPS, PowerP

IE has dealt with different architectures since its very beginning, as has Windows. Recall that Windows so far ran on x86, x86-64, IA64, DEC Alpha, MIPS, PowerPC and ARM (and I probably forgot a few). Also they re-used the Trident Engine whenever they needed a browser on another device, so ARM isn't exactly new to them (Windows Phone) or even other platforms (XBox 360 is PowerPC).