If you've had any sustained glitches with your Surface RT, check for a software update -- Microsoft might just have sorted it out. A February refresh pushing out today should mend problems with WiFi reliability that have led to the tablet showing "Limited" access. It also eliminates sluggishness in the power and volume controls, as well as Windows as a whole. Is your Surface snappier after the update? Let fellow owners know in the comments.Filed under: Tablets,