WFP drivers may cause a failure to disconnect the RDP connection to a multiprocessor computer that is running Windows Vista, Windows Server 2008, windows 7 or Windows Server 2008 R2
You have a computer that is running Windows Vista, Windows Server 2008, Windows 7 or Windows Server 2008 R2.
The computer has a multiprocessor.
Some Windows Filtering Platform (WFP) drivers are running on the computer.
In this scenario, you log on to and log off from the computer by using a Remote Desktop Protocol (RDP) connection. However, if you log on to and log off from the computer many times, the RDP connection may not be disconnected successfully. Therefore, when you try to log on to the computer again , you may receive an error message that resembles the following:
Another session is busy disconnecting
Note If you restart the computer, you can log on to the computer again.
This issue occurs because of a race condition in the WFP driver on the multiprocessor computer. WFP drivers can cause reference counts in the TCP/IP internal data structure -TCP/IP Control Block to leak. In this situation, the RDP connection cannot be disconnected. Therefore, you cannot log on to the computer again.
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 one of the following operating systems:
Windows Vista Service Pack 1 (SP1)
Windows Vista Service Pack 2 (SP2)
Windows Server 2008
Windows Server 2008 Service Pack 2 (SP2)
Windows 7
Windows Server 2008 R2
For more information about how to install the Windows Vista service pack, click the following article number to view the article in the Microsoft Knowledge Base:
How to obtain the latest Windows Vista service pack
For more information about how to install the Windows Server 2008 service pack, click the following article number to view the article in the Microsoft Knowledge Base:
How to obtain the latest service pack for Windows Server 2008
Restart requirement
You must restart the computer after you apply this hotfix.
Registry information
To use the hotfix in this package, you do not have to make any changes to the registry
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 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 of these 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 or milestone (RTM, SPn) can be identified by examining the file version numbers as shown in the following table:
Collapse this tableExpand this table
Version
Product
Milestone
Service branch
6.0.6001.22xxx
Windows Vista SP1 and Windows Server 2008
SP1
LDR
6.0.6002.22xxx
Windows Vista SP2 and Windows Server 2008 SP2
SP2
LDR
Service Pack 1 is integrated into the release version of Windows Server 2008. Therefore, RTM milestone files apply only to Windows Vista. RTM milestone files have a 6.0.0000.xxxxxx version number.
The MANIFEST files (.manifest) and MUM files (.mum) installed for each environment are
listed separately
. MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical to maintaining the state of the updated component. The security catalog files (attributes 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 name
File version
File size
Date
Time
Platform
Netio.sys
6.0.6001.22658
220,048
19-Mar-2010
18:27
x86
Netio.sys
6.0.6002.22250
221,752
23-Oct-2009
18:00
x86
Bfe.dll
6.0.6001.22658
328,704
19-Mar-2010
17:53
x86
Fwpkclnt.sys
6.0.6001.22658
98,184
19-Mar-2010
18:26
x86
Fwpuclnt.dll
6.0.6001.22658
595,456
19-Mar-2010
17:54
x86
Ikeext.dll
6.0.6001.22658
438,272
19-Mar-2010
17:54
x86
Wfp.mof
Not applicable
814
04-Mar-2010
05:54
Not applicable
Wfp.tmf
Not applicable
208,966
19-Mar-2010
16:19
Not applicable
Tcpip.sys
6.0.6001.22658
902,032
19-Mar-2010
18:27
x86
For all supported x64-based versions of Windows Server 2008 and of Windows Vista
Collapse this tableExpand this table
File name
File version
File size
Date
Time
Platform
Netio.sys
6.0.6001.22658
342,920
19-Mar-2010
18:43
x64
Netio.sys
6.0.6002.22250
346,168
23-Oct-2009
18:01
x64
Bfe.dll
6.0.6001.22658
458,240
19-Mar-2010
18:07
x64
Fwpkclnt.sys
6.0.6001.22658
165,264
19-Mar-2010
18:43
x64
Fwpuclnt.dll
6.0.6001.22658
779,776
19-Mar-2010
18:08
x64
Ikeext.dll
6.0.6001.22658
454,656
19-Mar-2010
18:09
x64
Wfp.mof
Not applicable
814
26-Feb-2010
04:14
Not applicable
Wfp.tmf
Not applicable
207,871
19-Mar-2010
16:42
Not applicable
Tcpip.sys
6.0.6001.22658
1,414,024
19-Mar-2010
18:43
x64
Fwpuclnt.dll
6.0.6001.22658
595,456
19-Mar-2010
17:54
x86
Wfp.mof
Not applicable
814
04-Mar-2010
05:54
Not applicable
For all supported IA64-based versions of Windows Server 2008
Collapse this tableExpand this table
File name
File version
File size
Date
Time
Platform
Netio.sys
6.0.6001.22658
638,352
19-Mar-2010
18:12
IA-64
Netio.sys
6.0.6002.22250
642,616
23-Oct-2009
17:53
IA-64
Bfe.dll
6.0.6001.22658
781,312
19-Mar-2010
17:36
IA-64
Fwpkclnt.sys
6.0.6001.22658
261,000
19-Mar-2010
18:11
IA-64
Fwpuclnt.dll
6.0.6001.22658
1,122,304
19-Mar-2010
17:36
IA-64
Ikeext.dll
6.0.6001.22658
925,696
19-Mar-2010
17:37
IA-64
Wfp.mof
Not applicable
814
25-Feb-2010
07:43
Not applicable
Wfp.tmf
Not applicable
207,955
19-Mar-2010
16:24
Not applicable
Tcpip.sys
6.0.6001.22658
2,941,320
19-Mar-2010
18:12
IA-64
Fwpuclnt.dll
6.0.6001.22658
595,456
19-Mar-2010
17:54
x86
Wfp.mof
Not applicable
814
04-Mar-2010
05:54
Not applicable
Windows 7 and Windows Server 2008 R2 file information notes
ImportantWindows 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 of these 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, milestone (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
Version
Product
Milestone
Service branch
6.1.760
0.16xxx
Windows 7 and Windows Server 2008 R2
RTM
GDR
6.1.760
0.20xxx
Windows 7 and Windows Server 2008 R2
RTM
LDR
GDR service branches contain only those fixes that are widely released to address widespread, critical 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 and for Windows 7" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical to maintaining the state of the updated component. 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
Collapse this tableExpand this table
File name
File version
File size
Date
Time
Platform
Netio.sys
6.1.7600.16475
240,216
02-Dec-2009
08:22
x86
Netio.sys
6.1.7600.20587
240,216
02-Dec-2009
08:21
x86
For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
Collapse this tableExpand this table
File name
File version
File size
Date
Time
Platform
Netio.sys
6.1.7600.16475
374,856
02-Dec-2009
09:24
x64
Netio.sys
6.1.7600.20587
374,856
03-Dec-2009
03:01
x64
For all supported IA-64-based versions of Windows Server 2008 R2
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