Virtual Machine Management Service memory leak triggers Windows Server 2008 R2 crash

View products that this article applies to.

Symptoms

When you have the Virtual Machine Management Service (Vmms.exe) running on a Windows Server 2008 R2-based computer, you notice that the service's memory use increases continually, and eventually the system crashes.

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Cause

This problem occurs because of a memory leak in the Virtual Machine Management Service.

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Resolution

Hotfix information

A supported hotfix is available from Microsoft Support. 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, go to the following Microsoft website:

http://support.microsoft.com/contactus/?ws=support

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 have Service Pack 1 for Windows Server 2008 R2 installed.

Restart requirement

You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any previously released hotfix.

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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 Server 2008 R2 file information and 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 files that apply to a specific product, SR_Level (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.

Version Product SR_Level Service branch
6.1.760
1.
22xxx Windows Server 2008 R2 SP1 LDR
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 Server 2008 R2" 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.

Version	Product	SR_Level	Service branch
6.1.760 1. 22xxx	Windows Server 2008 R2	SP1	LDR

For all supported x64-based versions of Windows Server 2008 R2

File name	File version	File size	Date	Time	Platform
Vmms.exe	6.1.7601.22809	4,628,992	13-Sep-2014	01:00	x64

Additional file information for Windows Server 2008 R2

Additional files for all supported x64-based versions of Windows Server 2008 R2

File name	Amd64_1428a6d59665ac15dea6d073114b7479_31bf3856ad364e35_6.1.7601.22809_none_278457c5a6e73bf1.manifest
File version	Not Applicable
File size	703
Date (UTC)	13-Sep-2014
Time (UTC)	05:21
Platform	Not Applicable

File name	Amd64_microsoft-hyper-v-vstack-vmms_31bf3856ad364e35_6.1.7601.22809_none_9555683c8e9d5678.manifest
File version	Not Applicable
File size	341,338
Date (UTC)	13-Sep-2014
Time (UTC)	02:18
Platform	Not Applicable