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Symptoms

You run an MS-DOS-based program on a computer that is running Windows 7. The program uses the MS-DOS protected mode interface. In this scenario, the program may crash.

Cause

This issue occurs because of a change in the Dosx.exe file in Windows 7.

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 website:

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

There are no prerequisites to apply this hotfix.

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 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) that are installed for each environment are listed separately in the "Additional file information for Windows 7" section. 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 name

File version

File size

Date

Time

Platform

Ansi.sys

Not applicable

9,029

13-Jul-2009

21:40

Not applicable

Append.exe

Not applicable

12,498

13-Jul-2009

21:40

Not applicable

Autoexec.bat

Not applicable

24

10-Jun-2009

21:42

Not applicable

Autoexec.nt

Not applicable

1,688

10-Jun-2009

21:42

Not applicable

Bios1.rom

Not applicable

28,420

10-Jun-2009

21:42

Not applicable

Bios4.rom

Not applicable

8,191

10-Jun-2009

21:42

Not applicable

Comm.drv

3.10.0.103

10,544

13-Jul-2009

21:41

Not applicable

Command.com

Not applicable

50,648

13-Jul-2009

21:40

Not applicable

Commdlg.dll

3.10.0.103

32,816

13-Jul-2009

21:41

Not applicable

Config.nt

Not applicable

2,577

10-Jun-2009

21:42

Not applicable

Config.sys

Not applicable

10

10-Jun-2009

21:42

Not applicable

Country.sys

Not applicable

27,097

13-Jul-2009

21:40

Not applicable

Csrstub.exe

6.1.7600.16385

47,616

14-Jul-2009

01:14

x86

Ctl3dv2.dll

2.99.0.0

27,200

10-Jun-2009

21:42

Not applicable

Ddeml.dll

3.50.0.103

39,424

13-Jul-2009

21:41

Not applicable

Debug.exe

Not applicable

20,634

13-Jul-2009

21:40

Not applicable

Dosx.exe

Not applicable

53,600

10-Sep-2010

00:32

Not applicable

Drwatson.exe

3.10.0.103

28,112

13-Jul-2009

21:41

Not applicable

Edit.com

Not applicable

69,886

10-Jun-2009

21:42

Not applicable

Edit.hlp

Not applicable

10,790

10-Jun-2009

21:42

Not applicable

Edlin.exe

Not applicable

12,642

13-Jul-2009

21:40

Not applicable

Ega.cpi

Not applicable

127,213

10-Jun-2009

21:26

Not applicable

Exe2bin.exe

Not applicable

8,424

13-Jul-2009

21:40

Not applicable

Fastopen.exe

Not applicable

882

13-Jul-2009

21:41

Not applicable

Gdi.exe

3.10.0.103

24,576

13-Jul-2009

21:41

Not applicable

Graftabl.com

6.1.7600.16385

58,880

13-Jul-2009

23:20

Not applicable

Graphics.com

Not applicable

19,694

13-Jul-2009

21:41

Not applicable

Graphics.pro

Not applicable

21,232

10-Jun-2009

21:42

Not applicable

Himem.sys

Not applicable

4,768

13-Jul-2009

21:40

Not applicable

Kb16.com

Not applicable

14,710

13-Jul-2009

21:40

Not applicable

Key01.sys

Not applicable

42,809

13-Jul-2009

21:40

Not applicable

Keyboard.drv

3.10.0.103

2,000

13-Jul-2009

21:41

Not applicable

Keyboard.sys

Not applicable

42,537

13-Jul-2009

21:40

Not applicable

Krnl386.exe

3.10.0.103

92,320

13-Jul-2009

21:41

Not applicable

Lanman.drv

2.10.0.1

221,600

10-Jun-2009

21:42

Not applicable

Loadfix.com

Not applicable

1,131

13-Jul-2009

21:40

Not applicable

Lzexpand.dll

3.10.0.103

9,936

10-Jun-2009

21:42

Not applicable

Mem.exe

Not applicable

39,274

13-Jul-2009

21:40

Not applicable

Mmsystem.dll

3.10.0.103

68,992

13-Jul-2009

21:41

Not applicable

Mmtask.tsk

3.10.0.103

1,152

13-Jul-2009

21:41

Not applicable

Mouse.drv

3.10.0.103

2,032

13-Jul-2009

21:41

Not applicable

Mscdexnt.exe

Not applicable

718

13-Jul-2009

21:41

Not applicable

Netapi.dll

3.11.0.300

108,464

10-Jun-2009

21:42

Not applicable

Nlsfunc.exe

Not applicable

7,052

13-Jul-2009

21:40

Not applicable

Ntdos.sys

Not applicable

27,866

13-Jul-2009

21:40

Not applicable

Ntdos404.sys

Not applicable

29,146

13-Jul-2009

21:40

Not applicable

Ntdos411.sys

Not applicable

29,370

13-Jul-2009

21:40

Not applicable

Ntdos412.sys

Not applicable

29,274

13-Jul-2009

21:40

Not applicable

Ntdos804.sys

Not applicable

29,146

13-Jul-2009

21:40

Not applicable

Ntio.sys

Not applicable

33,952

13-Jul-2009

21:40

Not applicable

Ntio404.sys

Not applicable

34,672

13-Jul-2009

21:40

Not applicable

Ntio411.sys

Not applicable

35,776

13-Jul-2009

21:40

Not applicable

Ntio412.sys

Not applicable

35,536

13-Jul-2009

21:40

Not applicable

Ntio804.sys

Not applicable

34,672

13-Jul-2009

21:40

Not applicable

Ntvdm.exe

6.1.7600.20797

526,848

10-Sep-2010

04:30

x86

Ntvdmd.dll

6.1.7600.16385

14,848

14-Jul-2009

01:16

x86

Olecli.dll

1.32.0.0

82,944

10-Jun-2009

21:42

Not applicable

Olesvr.dll

1.11.0.0

24,064

13-Jul-2009

21:41

Not applicable

Pmspl.dll

2.10.0.1

46,592

10-Jun-2009

21:42

Not applicable

Redir.exe

Not applicable

2,842

13-Jul-2009

21:41

Not applicable

Setver.exe

Not applicable

11,753

13-Jul-2009

21:40

Not applicable

Share.exe

Not applicable

882

13-Jul-2009

21:41

Not applicable

Shell.dll

3.10.0.103

5,120

13-Jul-2009

21:41

Not applicable

Sound.drv

3.10.0.103

1,744

13-Jul-2009

21:41

Not applicable

Sysedit.exe

3.10.0.103

18,896

10-Jun-2009

21:42

Not applicable

System.drv

3.10.0.103

3,360

13-Jul-2009

21:41

Not applicable

Timer.drv

3.10.0.103

4,048

13-Jul-2009

21:41

Not applicable

Toolhelp.dll

3.10.0.103

13,888

13-Jul-2009

21:41

Not applicable

User.exe

3.10.0.103

47,840

13-Jul-2009

21:41

Not applicable

V7vga.rom

Not applicable

18,832

10-Jun-2009

21:42

Not applicable

Vdmredir.dll

6.1.7600.16385

19,456

14-Jul-2009

01:16

x86

Ver.dll

3.10.0.103

9,008

10-Jun-2009

21:42

Not applicable

Vga.drv

3.10.0.103

2,176

13-Jul-2009

21:41

Not applicable

Wfwnet.drv

3.10.0.103

12,704

13-Jul-2009

21:41

Not
applicable

Wifeman.dll

3.10.0.103

9,216

13-Jul-2009

21:41

Not applicable

Win.com

6.1.7600.16385

6,656

13-Jul-2009

23:20

Not applicable

Win87em.dll

Not applicable

13,312

10-Jun-2009

21:42

Not applicable

Winhelp.exe

3.10.0.425

256,192

10-Jun-2009

21:42

Not applicable

Winnls.dll

3.10.0.103

5,120

13-Jul-2009

21:41

Not applicable

Winoldap.mod

3.10.0.103

2,080

13-Jul-2009

21:41

Not applicable

Winsock.dll

3.10.0.103

2,864

13-Jul-2009

21:41

Not applicable

Winspool.exe

3.10.0.103

2,112

13-Jul-2009

21:41

Not applicable

Wow32.dll

6.1.7600.16385

282,112

14-Jul-2009

01:16

x86

Wowdeb.exe

3.10.0.103

2,864

13-Jul-2009

21:41

Not applicable

Wowexec.exe

3.10.0.103

8,960

13-Jul-2009

21:41

Not applicable

_default.pif

Not applicable

707

10-Jun-2009

21:42

Not applicable

Ansi.sys

Not applicable

9,029

13-Jul-2009

21:40

Not applicable

Append.exe

Not applicable

12,498

13-Jul-2009

21:40

Not applicable

Autoexec.bat

Not applicable

24

10-Jun-2009

21:42

Not applicable

Autoexec.nt

Not applicable

1,688

10-Jun-2009

21:42

Not applicable

Bios1.rom

Not applicable

28,420

10-Jun-2009

21:42

Not applicable

Bios4.rom

Not applicable

8,191

10-Jun-2009

21:42

Not applicable

Comm.drv

3.10.0.103

10,544

13-Jul-2009

21:41

Not applicable

Command.com

Not applicable

50,648

13-Jul-2009

21:40

Not applicable

Commdlg.dll

3.10.0.103

32,816

13-Jul-2009

21:41

Not applicable

Config.nt

Not applicable

2,577

10-Jun-2009

21:42

Not applicable

Config.sys

Not applicable

10

10-Jun-2009

21:42

Not applicable

Country.sys

Not applicable

27,097

13-Jul-2009

21:40

Not applicable

Csrstub.exe

6.1.7600.16385

47,616

14-Jul-2009

01:14

x86

Ctl3dv2.dll

2.99.0.0

27,200

10-Jun-2009

21:42

Not applicable

Ddeml.dll

3.50.0.103

39,424

13-Jul-2009

21:41

Not applicable

Debug.exe

Not applicable

20,634

13-Jul-2009

21:40

Not applicable

Dosx.exe

Not applicable

53,600

10-Sep-2010

00:32

Not applicable

Drwatson.exe

3.10.0.103

28,112

13-Jul-2009

21:41

Not applicable

Edit.com

Not applicable

69,886

10-Jun-2009

21:42

Not applicable

Edit.hlp

Not applicable

10,790

10-Jun-2009

21:42

Not applicable

Edlin.exe

Not applicable

12,642

13-Jul-2009

21:40

Not applicable

Ega.cpi

Not applicable

127,213

10-Jun-2009

21:26

Not applicable

Exe2bin.exe

Not applicable

8,424

13-Jul-2009

21:40

Not applicable

Fastopen.exe

Not applicable

882

13-Jul-2009

21:41

Not applicable

Gdi.exe

3.10.0.103

24,576

13-Jul-2009

21:41

Not applicable

Graftabl.com

6.1.7600.16385

58,880

13-Jul-2009

23:20

Not applicable

Graphics.com

Not applicable

19,694

13-Jul-2009

21:41

Not applicable

Graphics.pro

Not applicable

21,232

10-Jun-2009

21:42

Not applicable

Himem.sys

Not applicable

4,768

13-Jul-2009

21:40

Not applicable

Kb16.com

Not applicable

14,710

13-Jul-2009

21:40

Not applicable

Key01.sys

Not applicable

42,809

13-Jul-2009

21:40

Not applicable

Keyboard.drv

3.10.0.103

2,000

13-Jul-2009

21:41

Not applicable

Keyboard.sys

Not applicable

42,537

13-Jul-2009

21:40

Not applicable

Krnl386.exe

3.10.0.103

92,320

13-Jul-2009

21:41

Not applicable

Lanman.drv

2.10.0.1

221,600

10-Jun-2009

21:42

Not applicable

Loadfix.com

Not applicable

1,131

13-Jul-2009

21:40

Not applicable

Lzexpand.dll

3.10.0.103

9,936

10-Jun-2009

21:42

Not applicable

Mem.exe

Not applicable

39,274

13-Jul-2009

21:40

Not applicable

Mmsystem.dll

3.10.0.103

68,992

13-Jul-2009

21:41

Not applicable

Mmtask.tsk

3.10.0.103

1,152

13-Jul-2009

21:41

Not applicable

Mouse.drv

3.10.0.103

2,032

13-Jul-2009

21:41

Not applicable

Mscdexnt.exe

Not applicable

718

13-Jul-2009

21:41

Not applicable

Netapi.dll

3.11.0.300

108,464

10-Jun-2009

21:42

Not applicable

Nlsfunc.exe

Not applicable

7,052

13-Jul-2009

21:40

Not applicable

Ntdos.sys

Not applicable

27,866

13-Jul-2009

21:40

Not applicable

Ntdos404.sys

Not applicable

29,146

13-Jul-2009

21:40

Not applicable

Ntdos411.sys

Not applicable

29,370

13-Jul-2009

21:40

Not applicable

Ntdos412.sys

Not applicable

29,274

13-Jul-2009

21:40

Not applicable

Ntdos804.sys

Not applicable

29,146

13-Jul-2009

21:40

Not applicable

Ntio.sys

Not applicable

33,952

13-Jul-2009

21:40

Not applicable

Ntio404.sys

Not applicable

34,672

13-Jul-2009

21:40

Not applicable

Ntio411.sys

Not applicable

35,776

13-Jul-2009

21:40

Not applicable

Ntio412.sys

Not applicable

35,536

13-Jul-2009

21:40

Not applicable

Ntio804.sys

Not applicable

34,672

13-Jul-2009

21:40

Not applicable

Ntvdm.exe

6.1.7600.20797

526,848

10-Sep-2010

04:30

x86

Ntvdmd.dll

6.1.7600.16385

14,848

02-Apr-2010

03:29

x86

Olecli.dll

1.32.0.0

82,944

10-Jun-2009

21:42

Not applicable

Olesvr.dll

1.11.0.0

24,064

13-Jul-2009

21:41

Not applicable

Pmspl.dll

2.10.0.1

46,592

10-Jun-2009

21:42

Not applicable

Redir.exe

Not applicable

2,842

13-Jul-2009

21:41

Not applicable

Setver.exe

Not applicable

11,753

13-Jul-2009

21:40

Not applicable

Share.exe

Not applicable

882

13-Jul-2009

21:41

Not applicable

Shell.dll

3.10.0.103

5,120

13-Jul-2009

21:41

Not applicable

Sound.drv

3.10.0.103

1,744

13-Jul-2009

21:41

Not applicable

Sysedit.exe

3.10.0.103

18,896

10-Jun-2009

21:42

Not applicable

System.drv

3.10.0.103

3,360

13-Jul-2009

21:41

Not applicable

Timer.drv

3.10.0.103

4,048

13-Jul-2009

21:41

Not applicable

Toolhelp.dll

3.10.0.103

13,888

13-Jul-2009

21:41

Not applicable

User.exe

3.10.0.103

47,840

13-Jul-2009

21:41

Not applicable

V7vga.rom

Not applicable

18,832

10-Jun-2009

21:42

Not applicable

Vdmredir.dll

6.1.7600.16385

19,456

02-Apr-2010

03:31

x86

Ver.dll

3.10.0.103

9,008

10-Jun-2009

21:42

Not applicable

Vga.drv

3.10.0.103

2,176

13-Jul-2009

21:41

Not
applicable

Wfwnet.drv

3.10.0.103

12,704

13-Jul-2009

21:41

Not applicable

Wifeman.dll

3.10.0.103

9,216

13-Jul-2009

21:41

Not applicable

Win.com

6.1.7600.16385

6,656

13-Jul-2009

23:20

Not applicable

Win87em.dll

Not applicable

13,312

10-Jun-2009

21:42

Not applicable

Winhelp.exe

3.10.0.425

256,192

10-Jun-2009

21:42

Not applicable

Winnls.dll

3.10.0.103

5,120

13-Jul-2009

21:41

Not applicable

Winoldap.mod

3.10.0.103

2,080

13-Jul-2009

21:41

Not applicable

Winsock.dll

3.10.0.103

2,864

13-Jul-2009

21:41

Not applicable

Winspool.exe

3.10.0.103

2,112

13-Jul-2009

21:41

Not applicable

Wow32.dll

6.1.7600.16385

282,112

02-Apr-2010

03:31

x86

Wowdeb.exe

3.10.0.103

2,864

13-Jul-2009

21:41

Not applicable

Wowexec.exe

3.10.0.103

8,960

13-Jul-2009

21:41

Not applicable

_default.pif

Not applicable

707

10-Jun-2009

21:42

Not 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 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 name

X86_44a6461c82035a33ded7458fb12b1b4a_31bf3856ad364e35_6.1.7600.20797_none_02e81db5a098a1ca.manifest

File version

Not applicable

File size

702

Date (UTC)

10-Sep-2010

Time (UTC)

07:57

Platform

Not applicable


File name

X86_85cc7df73337a340a9f144a2fa83e7d6_31bf3856ad364e35_7.1.7600.20797_none_7b5928c56a80d6e0.manifest

File version

Not applicable

File size

702

Date (UTC)

10-Sep-2010

Time (UTC)

07:57

Platform

Not applicable


File name

X86_microsoft-windows-ntvdm-system32_31bf3856ad364e35_6.1.7600.20797_none_fe64a262ed0552eb.manifest

File version

Not applicable

File size

111,067

Date (UTC)

10-Sep-2010

Time (UTC)

07:57

Platform

Not applicable


File name

X86_microsoft-windows-ntvdm-system32_31bf3856ad364e35_7.1.7600.20797_none_efd51ea877ebfbba.manifest

File version

Not applicable

File size

110,059

Date (UTC)

10-Sep-2010

Time (UTC)

07:57

Platform

Not applicable

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