You may experience one or more of the following symptoms on your Microsoft Windows XP Media Center Edition-based computer:
The remote device stops working while you are changing TV channels.
An external universal serial bus (USB) hard disk stops working.
Other USB peripheral devices, such as card readers, keyboards, or mouse devices stop working.
These devices are typically connected to an internal USB hub.
Note When these devices are connected to an internal USB hub, the connections are not visible. Therefore, you may not be able to see that the devices are connected to the computer's USB bus.
These problems may occur with certain hardware configurations when you perform certain actions. These actions include the following:
You disconnect a storage device, such as an external USB hard disk, before you stop the device.
You continuously or frequently change TV channels by using the remote.
These problems occur because of an error in the USB bus. If the Irbus.sys driver cannot recover from this error, any devices that use the USB bus will stop working.
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 this specific problem. 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.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 tool in Control Panel.
Date Time Version Size File name -------------------------------------------------------- 08-Dec-2004 00:13 5.1.2600.2578 17,024 Hidir.sys 08-Dec-2004 00:13 5.1.2600.2578 46,208 Irbus.sys
To work around these problems, use one of the following methods:
Disconnect and then reconnect the device that is not working.
Log off and then log back on to the computer.
Restart the computer.
Before you disconnect a storage device such as an external hard disk, first stop the device. Or, use the Safely Remove Hardware feature to notify the operating system that you are about to unplug the device. To do this, follow these steps:
Click the Safely Remove Hardware icon in the notification area. This icon displays a notification bubble with a list of devices that currently are attached to the system.
Click the device that you want to remove. This stops the device, and then you can safely unplug it.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Media Center Technical Support
Because Microsoft Windows XP Media Center Edition was included with your hardware device or system, the hardware manufacturer provides technical support and assistance for this software. Your manufacturer may have customized the installation with unique components such as specific device drivers and optional settings to maximize the performance of that manufacturer's hardware. If you require technical help with Windows XP Media Center Edition, contact your manufacturer directly because the manufacturer is best qualified to support the software that the manufacturer has installed on the hardware.
For additional information, 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