Symptoms

Windows Update does not install files on a Windows 10 Technical Preview-based computer that has system compression enabled.

Note On a computer that uses a solid-state drive (SSD) as its boot volume, system compression is enabled automatically.

Cause

When system compression is enabled, the method that file system uses to track file deletions may cause the Windows Update installer to think that the temp files cannot be extracted correctly. This prevents Windows Update from completing.

Resolution

Update information

An update is available to resolve this problem.

How to obtain this update

Windows Update

This update is available from Windows Update.

Prerequisites

There are no prerequisites for installing this update.

Registry information

To apply this update, you do not have to make any changes to the registry.

Restart requirement

You must restart the computer after you apply this update.

Update replacement information

This update does not replace a previously released update.


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" 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 32-bit versions of Windows 10 Technical Preview

File name

File version

File size

Date

Time

Platform

Wof.sys

6.4.9879.9

188,448

06-Dec-2014

07:56

x86

For all supported 64-bit versions of Windows 10 Technical Preview

File name

File version

File size

Date

Time

Platform

Wof.sys

6.4.9879.9

223,776

06-Dec-2014

09:56

x64

Additional file information

Additional information for all supported 32-bit versions of Windows 10 Technical Preview

File property

Value

File name

X86_18456614258ded6916ed858bab90079d_31bf3856ad364e35_6.4.9879.9_none_c2e643323457388e.manifest

File version

Not applicable

File size

693

Date (UTC)

12-Dec-2014

Time (UTC)

02:18

File name

X86_microsoft-windows-overlayfilter_31bf3856ad364e35_6.4.9879.9_none_7ede596ed154ad8c.manifest

File version

Not applicable

File size

16,851

Date (UTC)

06-Dec-2014

Time (UTC)

07:58

Additional information for all supported 64-bit versions of Windows 10 Technical Preview

File property

Value

File name

Amd64_ab562181130aa6e7691f126f9f261c70_31bf3856ad364e35_6.4.9879.9_none_33cdc56165b1dcf6.manifest

File version

Not applicable

File size

697

Date (UTC)

12-Dec-2014

Time (UTC)

02:18

File name

Amd64_microsoft-windows-overlayfilter_31bf3856ad364e35_6.4.9879.9_none_dafcf4f289b21ec2.manifest

File version

Not applicable

File size

16,855

Date (UTC)

06-Dec-2014

Time (UTC)

10:00


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 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

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