Summary: A driver fumble means that Santa won't be leaving many Windows 8 "Atom" tablets under the tree over the holidays.The holiday season is usually a great time for PC OEMs, and this one should be doubly so given that it comes hot on the heels of a new Windows release. But a fumble with driver certification means that Santa won't be leaving many Windows 8 "Atom" tablets under the tree.It seems that Dell and HP have both pushed back the launch of Windows 8 tablets running Intel's new power-efficient Atom Z2760 "Clover Trail" processor until January. According to InformationWeek, Dell's Latitude 10 and HP's Envy x2 convertible are affected.