When you try to download a file from the Internet by using Internet Explorer, the download stops responding

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Symptoms

When you try to download a file from the Internet by using Windows Internet Explorer in a Windows operating system, the download stops responding and then times out. The problem occurs when you use a USB modem that has a data transfer speed that is faster than or equal to 240 kilobits per second (Kbps).

Cause

The problem occurs because of a limitation in the current USB modem driver (Usbser.sys).

Resolution

Hotfix information

A supported feature that modifies the default behavior of the product is available from Microsoft. However, this feature is intended to modify only the behavior that this article describes. Apply this feature only to systems that specifically require it. This feature might receive additional testing. Therefore, if the system is not severely affected by the lack of this feature, we recommend that you wait for the next software update that contains this feature. If the feature 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 feature. 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 feature. 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=supportNote The "Hotfix download available" form displays the languages for which the feature is available. If you do not see your language, it is because the feature is not available for that language.

Prerequisites

To apply this hotfix, your computer must be running one of the following Windows operating systems:

Windows XP Service Pack 2 (SP2)
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

Registry information

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

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

Windows XP and Windows Server 2003 file information notes

In addition to the files that are listed in these tables, this hotfix also installs an associated security catalog file (KBnumber.cat) that is signed with a Microsoft digital signature.

For all supported x86-based versions of Windows XP

File name	File version	File size	Date	Time	Platform
Usbser.sys	5.1.2600.3020	25,728	23-Oct-2006	11:14	x86

Windows Vista and Windows Server 2008 file information notes

Important Windows Vista and Windows Server 2008 updates are included in the same packages. However, only one of these products may be listed on the "Hotfix Request" page. To request the hotfix package that applies to both Windows Vista and Windows Server 2008, just select the product that is listed on the page.

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
6.0.600 1. 22xxx	Windows Vista and Windows Server 2008	SP1	LDR
6.0.600 2. 22xxx	Windows Vista and Windows Server 2008	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.

For all supported x86-based versions of Windows Server 2008 and of Windows Vista

File name	File version	File size	Date	Time	Platform
Usbser.sys	6.0.6001.22565	27,648	17-Nov-2009	10:15	x86
Usbser.sys	6.0.6002.22269	27,648	17-Nov-2009	10:13	x86

For all supported x64-based versions of Windows Server 2008 and of Windows Vista

File name	File version	File size	Date	Time	Platform
Usbser.sys	6.0.6001.22565	32,768	17-Nov-2009	10:40	x64
Usbser.sys	6.0.6002.22269	32,768	17-Nov-2009	10:27	x64

For all supported IA-64-based versions of Windows Server 2008

File name	File version	File size	Date	Time	Platform
Usbser.sys	6.0.6001.22565	83,456	17-Nov-2009	10:33	IA-64
Usbser.sys	6.0.6002.22269	83,456	17-Nov-2009	10:22	IA-64

Windows 7 and Windows Server 2008 R2 file information notes

Important Windows 7 and Windows Server 2008 R2 hotfixes are included in the same packages. However, only one of these products may be listed on the "Hotfix Request" page. To request the hotfix package that applies to both Windows 7 and Windows Server 2008 R2, just select the product that is listed on the page.

For all supported x86-based versions of Windows 7

File name	File version	File size	Date	Time	Platform
Usbser.sys	6.1.7600.20576	27,648	16-Nov-2009	04:05	x86

For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name	File version	File size	Date	Time	Platform
Usbser.sys	6.1.7600.20576	32,768	16-Nov-2009	04:51	x64

For all supported IA-64-based versions of Windows Server 2008 R2

File name	File version	File size	Date	Time	Platform
Usbser.sys	6.1.7600.20576	83,968	16-Nov-2009	03:57	IA-64

Workaround

To work around this problem, set the USB modem transfer speed to a slower speed.

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, click the following article numbers to view the articles in the Microsoft Knowledge Base:

816915 New file naming schema for Microsoft Windows software update packages

824684 Description of the standard terminology that is used to describe Microsoft software updates