The backup process requires significantly more time when you use the Windows Backup utility in Windows 7 if the size of the backup files increases

Applies to: Windows 7

Symptoms


Consider the following scenario:
  • You use the Windows Backup utility to perform a backup on a computer that is running Windows 7. The backed up files are saved on a hard disk drive.
  • You use the Windows Backup utility again to perform a backup for a group of files that are larger than the first group of backed up files.

In this scenario, the backup process requires significantly more time than the backup process for the first group of backed up files.

For example, the backup process requires 2 hours for 100 gigabytes (GB) of files and 16 hours for 400 GB of files.

Resolution


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 the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

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, contact 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 Web site: 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 7.

Registry information

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

Restart requirement

You may have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

The English (United States) 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 7 file information notes
Important Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 7/Windows Server 2008 R2" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.
  • 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 Server 2008 R2 and for Windows 7" 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 7
File nameFile versionFile sizeDateTimePlatform
Microsoftwindowssafedocsmain-ppdlic.xrm-msNot Applicable3,19417-Jul-201007:39Not Applicable
Sdautoplay.dll6.1.7600.1638546,59214-Jul-200901:16x86
Sdclt.exe6.1.7600.207571,131,00817-Jul-201007:22x86
Sdengin2.dll6.1.7600.20757907,77617-Jul-201007:26x86
Sdrsvc.dll6.1.7600.20757125,95217-Jul-201007:26x86
Sdshext.dll6.1.7600.16385102,91214-Jul-200901:16x86
For all supported x64-based versions of Windows 7
File nameFile versionFile sizeDateTimePlatform
Microsoftwindowssafedocsmain-ppdlic.xrm-msNot Applicable3,19417-Jul-201008:17Not Applicable
Sdautoplay.dll6.1.7600.1638548,64014-Jul-200901:41x64
Sdclt.exe6.1.7600.207571,264,64017-Jul-201008:05x64
Sdengin2.dll6.1.7600.207571,120,76817-Jul-201008:06x64
Sdrsvc.dll6.1.7600.20757170,49617-Jul-201008:06x64
Sdshext.dll6.1.7600.16385126,46414-Jul-200901:41x64

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

Additional file information

Additional file information for Windows 7

Additional files for all supported x86-based versions of Windows 7
File nameX86_6d7c3a36ee5badf88a1560f1ac26098a_31bf3856ad364e35_6.1.7600.20757_none_cf3de23bbe2f7be9.manifest
File versionNot Applicable
File size701
Date (UTC)20-Jul-2010
Time (UTC)01:07
PlatformNot Applicable
File nameX86_microsoft-windows-safedocs-main_31bf3856ad364e35_6.1.7600.20757_none_258c2544e11f9f57.manifest
File versionNot Applicable
File size49,242
Date (UTC)20-Jul-2010
Time (UTC)01:10
PlatformNot Applicable
Additional files for all supported x64-based versions of Windows 7
File nameAmd64_b6d45829fb9b677ef0eed9db198c664f_31bf3856ad364e35_6.1.7600.20757_none_8ec9288e2b70263c.manifest
File versionNot Applicable
File size705
Date (UTC)20-Jul-2010
Time (UTC)01:07
PlatformNot Applicable
File nameAmd64_microsoft-windows-safedocs-main_31bf3856ad364e35_6.1.7600.20757_none_81aac0c8997d108d.manifest
File versionNot Applicable
File size49,246
Date (UTC)20-Jul-2010
Time (UTC)01:07
PlatformNot Applicable