One of Microsoft’s bigger frustrations over the past couple of years has been the continued devotion to Windows XP, the operating system that’s been around for more than a decade and that still has a devoted following despite the fact that Microsoft is pulling support for it after Tuesday. PCWorld’s Mark Hachman has written an obituary for Windows XP and as part of it he interviewed his own father about why he’s refused to upgrade to Windows 7 or Windows 8 and has stubbornly insisted on staying with XP for as long as he can. The elder Hachman’s reasons for sticking with XP are fascinating because they highlight something that Microsoft has struggled with as it’s tried to build a popular