Release Notes: Important Issues in Windows 8.1

These release notes address the most critical issues and information about the Windows 8.1 operating system. For information about by-design changes, new features, and fixes in this release, see For information you should review prior to installing this release, see Unless otherwise specified, these notes apply to all editions of Windows 8.1.

Setup with UEFI and 4K native drives

If you boot a computer in UEFI mode from the Windows 8.1 installation DVD and then attempt to install Windows 8.1 onto a drive that uses the 4K logical sector size (“4K native”), you will receive the following error: “We couldn't create a new partition.”

To avoid this, create the needed partition using Diskpart.exe instead of allowing Setup.exe to do it. When the installation wizard gets to the Where do you want to install Windows? page, press SHIFT+F10 to open a command prompt. Use DiskPart to create the partition, and then return to the installation wizard to continue installation. For information about using Diskpart.exe for this, see Sample: Configure UEFI/GPT-Based Hard Drive Partitions by Using Windows PE and DiskPart

If this has already occurred, follow these steps:

  1. On the Where do you want to install Windows? page of the wizard, select a partition created by Setup and then click Delete. Repeat for any other partitions also created by Setup.

  2. Click New to create a new installation partition, and then continue with installation.

For additional information about 4K sector drives, including steps to determine if your drive is of this type, see Microsoft support policy for 4K sector hard drives in Windows

Internet Explorer 11

  • Input Method Editor (IME) input does not accept non-Latin characters with Adobe Flash in Internet Explorer. Only Latin characters can be inserted with an IME. To avoid this, use Internet Explorer for desktop.

  • If you visit a website that contains Adobe Flash Player-based content, no PlayTo endpoints are listed in the Devices charm. There is no workaround at this time.

  • When you pause Adobe Flash Player-based content in Internet Explorer and switch to Internet Explorer for desktop, the content might not be visible when you return. To avoid this, do not pause content when switching to the desktop. If this has already occurred, try refreshing the web page.

Work Folders

The client and server must be running the same milestone release for Work Folders to function properly. For example, if the server is running this milestone release of Windows Server 2012 R2, the client must be running the same milestone release of Windows 8.1.

This document is provided “as-is”. Information and views expressed in this document, including URL and other Internet Web site references, may change without notice.

This document does not provide you with any legal rights to any intellectual property in any Microsoft product. You may copy and use this document for your internal, reference purposes.

©2013 Microsoft Corporation. All rights reserved.

Microsoft, Active Directory, Hyper-V, MS-DOS, Windows, Windows NT, Windows Server, and Windows Vista are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries.

This product contains graphics filter software; this software is based in part on the work of the Independent JPEG Group.

All other trademarks are property of their respective owners.