The Pi Foundation has unveiled the newest version of its smash-hit Raspberry Pi microcomputer, popular among DIY hobbyist and professional developers from pre-schools to heads of corporate engineering divisions. The biggest change brings Windows to the platform, brought about by a 6-month collaboration between the foundation and Microsoft to port the x86 Windows to the ARM architecture found in the Pi. At the hardware level, the device maintains the same footprint and most of the same components as the model B+ that preceded it – and costs the same $35. The biggest change is the new processor, which is a dramatic upgrade. The new quad-core ARM Cortex-A7 powered Broadcom BCM2836, clocked at 900MHz, offers six times the performance as the…