According to online reports, some users had wrapped up the Windows RT update only to see the notorious "Blue Screen of Death" (BSOD) display and an error message stating, "Your PC needs to be repaired. The Boot Configuration Data file is missing some required information."
By corrupting the boot configuration data, the update effectively "bricked" the device, rendering it inoperable. Some users posted recovery instructions
but they were long, involved and unlikely to be used by many.
The snafu was an embarrassment for Microsoft, as its Surface RT tablet, which debuted a year ago, has been the only Windows RT-powered device that has sold in any meaningful quantity.