Original sentence: Microsoft is said to be working on features similar to Spotlight and Quartz for the next version of Windows, code-named Longhorn; however, it is not expected until 2006 at the earliest
Edited sentence: Microsoft is said to be working on features similar to Spotlight and Quartz for the next version of Windows, code-named Longhorn; however, it is not expected until 2006 at the earliest(probably early 2007)