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You cannot start a Windows 8 or Windows Server 2012-based computer that has MBR disk installed

Symptoms
Assume that you have Windows 8 or Windows Server 2012 installed on a GUID partition table (GPT) disk of a computer. After you install a master boot record (MBR) disk that has an extended partition, you cannot start the computer.

Note This issue also occurs when you try to start the computer by using Windows Preinstall Environment (PE) 4.0. 
Cause
This issue occurs because the MBR disk cannot be enumerated during the start process.
Resolution
This hotfix is also available at Microsoft Update Catalog

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there is a "Hotfix Download Available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft website: Note The "Hotfix Download Available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

To apply this hotfix, you must be running Windows 8 or Windows Server 2012.

Registry information

To use the hotfix in this package, you do not have to make any changes to the registry.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

The global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.
Windows 8 file information notes
Important Windows 8 hotfixes and Windows Server 2012 hotfixes are included in the same packages. However, only "Windows 8" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 8" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.
  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:
    VersionProductMilestoneService branch
    6.2.920 0.16 xxxWindows 8 and Windows Server 2012RTMGDR
    6.2.920 0.20 xxxWindows 8 and Windows Server 2012RTMLDR
  • GDR service branches contain only those fixes that are widely released to address widespread, extremely important issues. LDR service branches contain hotfixes in addition to widely released fixes.
  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows 8" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.
For all supported x86-based versions of Windows 8
File nameFile versionFile sizeDateTimePlatform
Winload.efi6.2.9200.166031,166,74406-May-201322:39Not applicable
Winload.exe6.2.9200.166031,063,96006-May-201322:39x86
Winload.efi6.2.9200.207091,166,74408-May-201323:35Not applicable
Winload.exe6.2.9200.207091,063,96008-May-201323:35x86
Winload.efi6.2.9200.166031,166,74406-May-201322:39Not applicable
Winload.exe6.2.9200.166031,063,96006-May-201322:39x86
Winresume.efi6.2.9200.165631,034,97628-Mar-201322:07Not applicable
Winresume.exe6.2.9200.16563939,42428-Mar-201322:07x86
Winload.efi6.2.9200.207091,166,74408-May-201323:35Not applicable
Winload.exe6.2.9200.207091,063,96008-May-201323:35x86
Winresume.efi6.2.9200.206741,034,97630-Mar-201318:13Not applicable
Winresume.exe6.2.9200.20674939,42430-Mar-201318:13x86
For all supported x64-based versions of Windows 8 and Windows Server 2012
File nameFile versionFile sizeDateTimePlatform
Winload.efi6.2.9200.166031,403,80806-May-201322:40Not applicable
Winload.exe6.2.9200.166031,267,44806-May-201322:40x64
Winload.efi6.2.9200.207091,403,80808-May-201323:58Not applicable
Winload.exe6.2.9200.207091,267,44808-May-201323:58x64
Winload.efi6.2.9200.166031,403,80806-May-201322:40Not applicable
Winload.exe6.2.9200.166031,267,44806-May-201322:40x64
Winresume.efi6.2.9200.165631,217,32828-Mar-201322:09Not applicable
Winresume.exe6.2.9200.165631,093,88028-Mar-201322:09x64
Winload.efi6.2.9200.207091,403,80808-May-201323:58Not applicable
Winload.exe6.2.9200.207091,267,44808-May-201323:58x64
Winresume.efi6.2.9200.206681,217,32828-Mar-201323:24Not applicable
Winresume.exe6.2.9200.206681,093,88028-Mar-201323:25x64


Workaround
To work around the issue, do not add MBR disk to the computer. Use only GPT disks.
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
More information
For more information about GPT disk and MBR disk, click the following article number to go to the article in the Microsoft Knowledge Base:
2581408 Windows support for disks that are larger than 2 TB

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

Additional file information

Additional file information for Windows 8 and Windows Server 2012

Additional files for all supported x86-based versions of Windows 8
File nameUpdate-bf.mum
File versionNot applicable
File size2,205
Date (UTC)09-May-2013
Time (UTC)17:54
PlatformNot applicable
File nameX86_170387ae15a1f27a5fadab63fe777d64_31bf3856ad364e35_6.2.9200.20711_none_beb77600654ce081.manifest
File versionNot applicable
File size713
Date (UTC)09-May-2013
Time (UTC)17:54
PlatformNot applicable
File nameX86_25b80709fc6481ef8ebd83391010a3fd_31bf3856ad364e35_6.2.9200.20711_none_7e6e4c9a9119e7b1.manifest
File versionNot applicable
File size718
Date (UTC)09-May-2013
Time (UTC)17:54
PlatformNot applicable
File nameX86_8da950674fa7a0a80cab9bce69ee749d_31bf3856ad364e35_6.2.9200.16607_none_0f080bc9244c3fe8.manifest
File versionNot applicable
File size718
Date (UTC)09-May-2013
Time (UTC)17:54
PlatformNot applicable
File nameX86_dac17ae21eb3af92f0b6fca84b1f2947_31bf3856ad364e35_6.2.9200.16607_none_487a19a37032ac30.manifest
File versionNot applicable
File size713
Date (UTC)09-May-2013
Time (UTC)17:54
PlatformNot applicable
File nameX86_microsoft-windows-b..ment-windows-minwin_31bf3856ad364e35_6.2.9200.16607_none_4cf0382bcd21b743.manifest
File versionNot applicable
File size2,984
Date (UTC)09-May-2013
Time (UTC)01:33
PlatformNot applicable
File nameX86_microsoft-windows-b..ment-windows-minwin_31bf3856ad364e35_6.2.9200.20711_none_4d69034ee64cdaf4.manifest
File versionNot applicable
File size2,984
Date (UTC)09-May-2013
Time (UTC)01:12
PlatformNot applicable
File nameX86_microsoft-windows-b..vironment-os-loader_31bf3856ad364e35_6.2.9200.16607_none_582b4c033dca08fb.manifest
File versionNot applicable
File size5,802
Date (UTC)09-May-2013
Time (UTC)01:33
PlatformNot applicable
File nameX86_microsoft-windows-b..vironment-os-loader_31bf3856ad364e35_6.2.9200.20711_none_58a4172656f52cac.manifest
File versionNot applicable
File size5,802
Date (UTC)09-May-2013
Time (UTC)01:12
PlatformNot applicable
Additional files for all supported x64-based versions of Windows 8 and Windows Server 2012
File nameAmd64_0887f4e5fd24b2715a5da0a17f95deed_31bf3856ad364e35_6.2.9200.16607_none_02482a6b46bc9286.manifest
File versionNot applicable
File size722
Date (UTC)09-May-2013
Time (UTC)17:59
PlatformNot applicable
File nameAmd64_132ff7bbc9fc34cfa6544511f84bd0ec_31bf3856ad364e35_6.2.9200.20711_none_017e84bd02eb2938.manifest
File versionNot applicable
File size717
Date (UTC)09-May-2013
Time (UTC)17:59
PlatformNot applicable
File nameAmd64_4d75978a1525f031191891cddc39574d_31bf3856ad364e35_6.2.9200.20711_none_1bb3c03ee5f0ce76.manifest
File versionNot applicable
File size722
Date (UTC)09-May-2013
Time (UTC)17:59
PlatformNot applicable
File nameAmd64_f37f1c5ac67d609854ee2eb55aef2d97_31bf3856ad364e35_6.2.9200.16607_none_1f4f5eaa1ddb42c1.manifest
File versionNot applicable
File size717
Date (UTC)09-May-2013
Time (UTC)17:59
PlatformNot applicable
File nameAmd64_microsoft-windows-b..ment-windows-minwin_31bf3856ad364e35_6.2.9200.16607_none_a90ed3af857f2879.manifest
File versionNot applicable
File size2,988
Date (UTC)09-May-2013
Time (UTC)03:55
PlatformNot applicable
File nameAmd64_microsoft-windows-b..ment-windows-minwin_31bf3856ad364e35_6.2.9200.20711_none_a9879ed29eaa4c2a.manifest
File versionNot applicable
File size2,988
Date (UTC)09-May-2013
Time (UTC)03:03
PlatformNot applicable
File nameAmd64_microsoft-windows-b..vironment-os-loader_31bf3856ad364e35_6.2.9200.16607_none_b449e786f6277a31.manifest
File versionNot applicable
File size5,808
Date (UTC)09-May-2013
Time (UTC)03:55
PlatformNot applicable
File nameAmd64_microsoft-windows-b..vironment-os-loader_31bf3856ad364e35_6.2.9200.20711_none_b4c2b2aa0f529de2.manifest
File versionNot applicable
File size5,808
Date (UTC)09-May-2013
Time (UTC)03:03
PlatformNot applicable
File nameUpdate-bf.mum
File versionNot applicable
File size2,673
Date (UTC)09-May-2013
Time (UTC)17:59
PlatformNot applicable
Properties

Article ID: 2841194 - Last Review: 12/17/2015 06:14:00 - Revision: 3.0

Windows Server 2012 Datacenter, Windows Server 2012 Standard, Windows Server 2012 Essentials, Windows Server 2012 Foundation, Windows 8 Enterprise, Windows 8 Pro, Windows 8

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