Symptoms

After you install update rollup 2919355 (April 2014) for Windows 8.1 and Windows Server 2012 R2, or after you install either of these operating systems from media that includes this update rollup, you cannot restart the computer because the computer experiences a restart loop.

More Information

Update information

How to obtain this update

This update is offered when you upgrade to the release version of Windows 8.1 or Windows Server 2012 R2.

The global version of this update 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.

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 8.1 and Windows Server 2012 R2" section. MUM, MANIFEST, and the associated security catalog (.cat) files, are very 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 8.1

File name

File version

File size

Date

Time

Platform

Storport.sys

6.3.9600.17122

311,640

14-May-2014

04:01

x86

For all supported x64-based versions of Windows 8.1 and of Windows Server 2012 R2

File name

File version

File size

Date

Time

Platform

Storport.sys

6.3.9600.17122

373,080

14-May-2014

05:12

x64



For more information about this issue, click the following article number to view the article in the Microsoft Knowledge Base:

2966870 Fix restart problems after you install update rollup 2919355 in Windows 8.1 or Windows Server 2012 R2 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

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