An update is available for Windows 8.1 Preview. This update improves the performance of the Search charm.
How to obtain this update
Method 1: Windows Update
This update is available from Windows Update.
Method 2: Microsoft Update Catalog
To get the stand-alone package for this update, go to the Microsoft Update Catalog website.
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates