Scheduled tasks are delayed in Windows Server 2008 or in Windows Vista

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Article ID: 982341 - View products that this article applies to.
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SYMPTOMS

Consider the following scenario:
  • You create some tasks in Task Scheduler on a computer that is running Windows Server 2008 or Windows Vista. Some of these tasks are randomly delayed tasks.

    Note To create a randomly delayed task in Task Scheduler, click to select the Delay task for up to (random delay) check box, and then specify a time period from the drop-down menu.
  • You use a time-based trigger to run these tasks at some scheduled times.
In this scenario, some tasks that are not randomly delayed tasks are postponed until the randomly delayed tasks are processed.

CAUSE

This issue occurs because Task Scheduler does not handle the random delayed tasks correctly when Task Scheduler evaluates jobs that should be started within a time period. This behavior causes some tasks that are not randomly delayed tasks not to run at the specified time. These jobs are started as missed schedules when the randomly delayed tasks are processed some time later.

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:
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 be running one of the following operating systems:
  • Windows Server 2008 Service Pack 2 (SP2)
  • Windows Server 2008
  • Windows Vista Service Pack 2 (SP2)
  • Windows Vista Service Pack 1 (SP1)
For more information about how to obtain a Windows Vista service pack, click the following article number to view the article in the Microsoft Knowledge Base:
935791 How to obtain the latest Windows Vista service pack
For more information about how to obtain a Windows Server 2008 service pack, click the following article number to view the article in the Microsoft Knowledge Base:
968849 How to obtain the latest service pack for Windows Server 2008

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 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 Vista and Windows Server 2008 file information notes
Important Windows Vista hotfixes and Windows Server 2008 hotfixes are included in the same packages. However, only "Windows Vista" 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 Vista" 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.
    Collapse this tableExpand this table
    VersionProductSR_LevelService branch
    6.0.600 1 . 22xxxWindows Vista and Windows Server 2008SP1LDR
    6.0.600 2 . 22xxxWindows Vista and Windows Server 2008SP2LDR
  • Service Pack 1 is integrated into the release version of Windows Server 2008.
  • 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 and for Windows Vista" section. MUM files 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 Server 2008 and of Windows Vista
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Tmm.dll6.0.6001.226911,298,43213-May-201017:16x86
Tmm.dll6.0.6002.224041,298,43213-May-201018:28x86
Taskeng.exe6.0.6001.22691169,98413-May-201015:38x86
Taskeng.mofNot applicable2,25404-Mar-201006:02Not applicable
Taskeng.exe6.0.6002.22404169,98413-May-201016:01x86
Taskeng.mofNot applicable2,25403-Apr-200921:40Not applicable
Schedsvc.dll6.0.6001.22691598,01613-May-201017:16x86
Schedsvc.mofNot applicable2,25004-Mar-201006:02Not applicable
Schedsvc.dll6.0.6002.22404595,96813-May-201018:27x86
Schedsvc.mofNot applicable2,25003-Apr-200921:40Not applicable
For all supported x64-based versions of Windows Server 2008 and of Windows Vista
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Tmm.dll6.0.6001.226911,319,42413-May-201017:35x64
Tmm.dll6.0.6002.224041,319,42413-May-201018:27x64
Taskeng.exe6.0.6001.22691265,21613-May-201015:56x64
Taskeng.mofNot applicable2,25426-Feb-201004:20Not applicable
Taskeng.exe6.0.6002.22404265,21613-May-201016:14x64
Taskeng.mofNot applicable2,25403-Apr-200921:04Not applicable
Schedsvc.dll6.0.6001.22691844,80013-May-201017:34x64
Schedsvc.mofNot applicable2,25026-Feb-201004:20Not applicable
Schedsvc.dll6.0.6002.22404844,80013-May-201018:26x64
Schedsvc.mofNot applicable2,25003-Apr-200921:04Not applicable
For all supported IA-64-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Taskeng.exe6.0.6001.22691518,65613-May-201015:43IA-64
Taskeng.mofNot applicable2,25425-Feb-201007:47Not applicable
Taskeng.exe6.0.6002.22404518,65613-May-201016:08IA-64
Taskeng.mofNot applicable2,25403-Apr-200921:04Not applicable
Schedsvc.dll6.0.6001.226911,397,24813-May-201017:17IA-64
Schedsvc.mofNot applicable2,25025-Feb-201007:47Not applicable
Schedsvc.dll6.0.6002.224041,397,24813-May-201018:13IA-64
Schedsvc.mofNot applicable2,25003-Apr-200921:04Not applicable

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 Task Scheduler, visit the following Microsoft website:
An overview of Task Scheduler
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 Vista and for Windows Server 2008

Additional files for all supported x86-based versions of Windows Vista and of Windows Server 2008
Collapse this tableExpand this table
File nameUpdate.mum
File versionNot applicable
File size3,433
Date (UTC)14-May-2010
Time (UTC)04:54
PlatformNot applicable

File nameX86_09b697a3c611bb2610697140bf76d32d_31bf3856ad364e35_6.0.6002.22404_none_e0d9325a726e503d.manifest
File versionNot applicable
File size700
Date (UTC)14-May-2010
Time (UTC)04:54
PlatformNot applicable

File nameX86_0fb93644f9a1d2d14afeb90c66f0e54f_31bf3856ad364e35_6.0.6002.22404_none_c5f8d3f6582ea1bb.manifest
File versionNot applicable
File size709
Date (UTC)14-May-2010
Time (UTC)04:54
PlatformNot applicable

File nameX86_1a247aaffe44395481d6539ffe024e07_31bf3856ad364e35_6.0.6001.22691_none_6dbbc2108cbfad9a.manifest
File versionNot applicable
File size709
Date (UTC)14-May-2010
Time (UTC)04:54
PlatformNot applicable

File nameX86_7718191a0bb20fb5e468882d6757207d_31bf3856ad364e35_6.0.6002.22404_none_9d6137e22a936e78.manifest
File versionNot applicable
File size708
Date (UTC)14-May-2010
Time (UTC)04:54
PlatformNot applicable

File nameX86_bcc98193b971ba38042c6c86185c5113_31bf3856ad364e35_6.0.6001.22691_none_9b157fc0882189a6.manifest
File versionNot applicable
File size700
Date (UTC)14-May-2010
Time (UTC)04:54
PlatformNot applicable

File nameX86_df2b8076741ea2ead74271f25595cf58_31bf3856ad364e35_6.0.6001.22691_none_ac08233a93cb3788.manifest
File versionNot applicable
File size708
Date (UTC)14-May-2010
Time (UTC)04:54
PlatformNot applicable

File nameX86_microsoft-windows-mobilepc-tmm_31bf3856ad364e35_6.0.6001.22691_none_14889336d8b79ec9.manifest
File versionNot applicable
File size10,104
Date (UTC)13-May-2010
Time (UTC)18:57
PlatformNot applicable

File nameX86_microsoft-windows-mobilepc-tmm_31bf3856ad364e35_6.0.6002.22404_none_16d3572ed59241a0.manifest
File versionNot applicable
File size10,104
Date (UTC)13-May-2010
Time (UTC)20:08
PlatformNot applicable

File nameX86_microsoft-windows-taskscheduler-engine_31bf3856ad364e35_6.0.6001.22691_none_e5d5a475d84013b4.manifest
File versionNot applicable
File size8,325
Date (UTC)13-May-2010
Time (UTC)19:00
PlatformNot applicable

File nameX86_microsoft-windows-taskscheduler-engine_31bf3856ad364e35_6.0.6002.22404_none_e820686dd51ab68b.manifest
File versionNot applicable
File size8,325
Date (UTC)13-May-2010
Time (UTC)20:11
PlatformNot applicable

File nameX86_microsoft-windows-taskscheduler-service_31bf3856ad364e35_6.0.6001.22691_none_2f2a75d8b0681f15.manifest
File versionNot applicable
File size116,561
Date (UTC)13-May-2010
Time (UTC)19:00
PlatformNot applicable

File nameX86_microsoft-windows-taskscheduler-service_31bf3856ad364e35_6.0.6002.22404_none_317539d0ad42c1ec.manifest
File versionNot applicable
File size116,561
Date (UTC)13-May-2010
Time (UTC)20:11
PlatformNot applicable
Additional files for all supported x64-based versions of Windows Vista and of Windows Server 2008
Collapse this tableExpand this table
File nameUpdate.mum
File versionNot applicable
File size3,461
Date (UTC)14-May-2010
Time (UTC)04:54
PlatformNot applicable

File nameAmd64_24264e9cc8adf022a5719f871af48295_31bf3856ad364e35_6.0.6001.22691_none_d4d2406b9651ff3b.manifest
File versionNot applicable
File size1,064
Date (UTC)14-May-2010
Time (UTC)04:54
PlatformNot applicable

File nameAmd64_6882c4977f066b58ed623cf85b4e9989_31bf3856ad364e35_6.0.6002.22404_none_24a21b1c3692e43c.manifest
File versionNot applicable
File size1,048
Date (UTC)14-May-2010
Time (UTC)04:54
PlatformNot applicable

File nameAmd64_6d3f6d776f0b287cac85fc92efdba81a_31bf3856ad364e35_6.0.6001.22691_none_34b4064ec0f3af2a.manifest
File versionNot applicable
File size1,048
Date (UTC)14-May-2010
Time (UTC)04:54
PlatformNot applicable

File nameAmd64_7799d1909b7385b1aa13128c43c45c93_31bf3856ad364e35_6.0.6001.22691_none_2956be134bc39e43.manifest
File versionNot applicable
File size1,068
Date (UTC)14-May-2010
Time (UTC)04:54
PlatformNot applicable

File nameAmd64_a2e38c556a58ab3d27aec10796052a38_31bf3856ad364e35_6.0.6002.22404_none_2179e596318c6303.manifest
File versionNot applicable
File size1,064
Date (UTC)14-May-2010
Time (UTC)04:54
PlatformNot applicable

File nameAmd64_fa082cee5210e0db7ad8155d534bdaef_31bf3856ad364e35_6.0.6002.22404_none_e072f112a1df78bf.manifest
File versionNot applicable
File size1,068
Date (UTC)14-May-2010
Time (UTC)04:54
PlatformNot applicable

File nameAmd64_microsoft-windows-mobilepc-tmm_31bf3856ad364e35_6.0.6001.22691_none_70a72eba91150fff.manifest
File versionNot applicable
File size10,444
Date (UTC)13-May-2010
Time (UTC)19:16
PlatformNot applicable

File nameAmd64_microsoft-windows-mobilepc-tmm_31bf3856ad364e35_6.0.6002.22404_none_72f1f2b28defb2d6.manifest
File versionNot applicable
File size10,444
Date (UTC)13-May-2010
Time (UTC)20:05
PlatformNot applicable

File nameAmd64_microsoft-windows-taskscheduler-engine_31bf3856ad364e35_6.0.6001.22691_none_41f43ff9909d84ea.manifest
File versionNot applicable
File size8,359
Date (UTC)13-May-2010
Time (UTC)19:19
PlatformNot applicable

File nameAmd64_microsoft-windows-taskscheduler-engine_31bf3856ad364e35_6.0.6002.22404_none_443f03f18d7827c1.manifest
File versionNot applicable
File size8,359
Date (UTC)13-May-2010
Time (UTC)20:08
PlatformNot applicable

File nameAmd64_microsoft-windows-taskscheduler-service_31bf3856ad364e35_6.0.6001.22691_none_8b49115c68c5904b.manifest
File versionNot applicable
File size116,603
Date (UTC)13-May-2010
Time (UTC)19:18
PlatformNot applicable

File nameAmd64_microsoft-windows-taskscheduler-service_31bf3856ad364e35_6.0.6002.22404_none_8d93d55465a03322.manifest
File versionNot applicable
File size116,603
Date (UTC)13-May-2010
Time (UTC)20:08
PlatformNot applicable

File nameWow64_microsoft-windows-taskscheduler-service_31bf3856ad364e35_6.0.6001.22691_none_959dbbae9d265246.manifest
File versionNot applicable
File size108,847
Date (UTC)13-May-2010
Time (UTC)18:51
PlatformNot applicable

File nameWow64_microsoft-windows-taskscheduler-service_31bf3856ad364e35_6.0.6002.22404_none_97e87fa69a00f51d.manifest
File versionNot applicable
File size108,847
Date (UTC)13-May-2010
Time (UTC)20:02
PlatformNot applicable
Additional files for all supported IA-64-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameUpdate.mum
File versionNot applicable
File size2,249
Date (UTC)14-May-2010
Time (UTC)04:54
PlatformNot applicable

File nameIa64_2d15a33152f44860c23c2803e7d67b6b_31bf3856ad364e35_6.0.6001.22691_none_0413c52d1659748e.manifest
File versionNot applicable
File size1,062
Date (UTC)14-May-2010
Time (UTC)04:54
PlatformNot applicable

File nameIa64_44302356ae374d5dbae4373a9a0eabc7_31bf3856ad364e35_6.0.6001.22691_none_2a9e3ae2a4e10944.manifest
File versionNot applicable
File size1,066
Date (UTC)14-May-2010
Time (UTC)04:54
PlatformNot applicable

File nameIa64_7dc93995c2af70b4dd075cea25e68584_31bf3856ad364e35_6.0.6002.22404_none_14bf3f0800a9e8a9.manifest
File versionNot applicable
File size1,062
Date (UTC)14-May-2010
Time (UTC)04:54
PlatformNot applicable

File nameIa64_fba3c561bfb7e8334c660aef66d6e659_31bf3856ad364e35_6.0.6002.22404_none_bd2d3bf7fec87342.manifest
File versionNot applicable
File size1,066
Date (UTC)14-May-2010
Time (UTC)04:54
PlatformNot applicable

File nameIa64_microsoft-windows-taskscheduler-engine_31bf3856ad364e35_6.0.6001.22691_none_e5d7486bd83e1cb0.manifest
File versionNot applicable
File size8,342
Date (UTC)13-May-2010
Time (UTC)18:42
PlatformNot applicable

File nameIa64_microsoft-windows-taskscheduler-engine_31bf3856ad364e35_6.0.6002.22404_none_e8220c63d518bf87.manifest
File versionNot applicable
File size8,342
Date (UTC)13-May-2010
Time (UTC)19:40
PlatformNot applicable

File nameIa64_microsoft-windows-taskscheduler-service_31bf3856ad364e35_6.0.6001.22691_none_2f2c19ceb0662811.manifest
File versionNot applicable
File size116,582
Date (UTC)13-May-2010
Time (UTC)18:42
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File nameIa64_microsoft-windows-taskscheduler-service_31bf3856ad364e35_6.0.6002.22404_none_3176ddc6ad40cae8.manifest
File versionNot applicable
File size116,582
Date (UTC)13-May-2010
Time (UTC)19:40
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Properties

Article ID: 982341 - Last Review: June 10, 2010 - Revision: 2.0
APPLIES TO
  • Windows Server 2008 Service Pack 2, when used with:
    • Windows Server 2008 Datacenter
    • Windows Server 2008 Datacenter without Hyper-V
    • Windows Server 2008 Enterprise
    • Windows Server 2008 Enterprise without Hyper-V
    • Windows Server 2008 Standard
    • Windows Server 2008 Standard without Hyper-V
    • Windows Server 2008 for Itanium-Based Systems
  • Windows Server 2008 Datacenter
  • Windows Server 2008 Datacenter without Hyper-V
  • Windows Server 2008 Enterprise
  • Windows Server 2008 Enterprise without Hyper-V
  • Windows Server 2008 Standard
  • Windows Server 2008 Standard without Hyper-V
  • Windows Server 2008 for Itanium-Based Systems
  • Windows Vista Service Pack 2, when used with:
    • Windows Vista Business
    • Windows Vista Business 64-bit Edition
    • Windows Vista Enterprise
    • Windows Vista Enterprise 64-bit Edition
    • Windows Vista Home Basic
    • Windows Vista Home Basic 64-bit Edition
    • Windows Vista Home Premium
    • Windows Vista Home Premium 64-bit Edition
    • Windows Vista Ultimate
    • Windows Vista Ultimate 64-bit Edition
  • Windows Vista Service Pack 1, when used with:
    • Windows Vista Business
    • Windows Vista Business 64-bit Edition
    • Windows Vista Enterprise
    • Windows Vista Enterprise 64-bit Edition
    • Windows Vista Home Basic
    • Windows Vista Home Basic 64-bit Edition
    • Windows Vista Home Premium
    • Windows Vista Home Premium 64-bit Edition
    • Windows Vista Ultimate
    • Windows Vista Ultimate 64-bit Edition
Keywords: 
kbexpertiseinter kbHotfixServer kbqfe kbfix kbautohotfix kbsurveynew kbprb KB982341

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