This article provides steps that you can use to troubleshoot hardware configuration problems by using Device Manager. You can use Device Manager to examine and change software-configurable devices. Note that if your hardware device uses jumper pins or dip switches, you must configure the
To start Device Manager:
- Click Start, and then click Control Panel.
- Click Performance and Maintenance, and then click System.
- Click the Hardware tab, and then click Device Manager.
- If there is a problem with a device, it is listed in the hardware
tree. Also, the problem device has a symbol that indicates the type
NOTE: Some sound cards and video adapters do not report all of
the resources that they use to Windows. This can cause Device Manager
to show only one device in conflict, or no conflicts at all. This can
be verified by disabling the sound card, or by using the standard VGA
video driver to see if the conflict is resolved. Note that this is a
known problem with S3 video adapters and 16-bit Sound Blaster sound
cards, or those sound cards that are using Sound Blaster emulation
for Sound Blaster compatibility.
- A black exclamation point (!) on a yellow field indicates
the device is in a problem state. Note that a device that is in
a problem state can be functioning.
- A problem code explaining the problem is displayed for the
- A red "X" indicates a disabled device. A disabled device is
a device that is physically present in the computer and is
consuming resources, but does not have a protected-mode driver
- A blue "i" on a white field on a device resource in Computer
properties indicates that the Use automatic
settings feature is not selected for the device and that
the resource was manually selected. Note that this does not
indicate a problem or disabled state.
- A green question mark "?" in Device Manager means that a
compatible driver for this device is installed, indicating the
possibility that all of the functionality may not be available.
Note that this applies only to Windows Millennium Edition (Me).
- When you double click a specific device in Device Manager, you see
a property sheet. The property sheet has a General tab.
NOTE: Some devices may have other tabs besides the
General tab. Not all property sheets have the same tabs; some
devices may have a Resources tab, Driver tab, and
Settings tab, or some combination of these.
At the top of the property sheet, there is a description of the
device. When you click the Resources tab, the window in the
middle of the tab indicates which resource types are available for
the selected device.
The list box at the bottom contains a Conflicting
device list. This list indicates a conflict with an error code.
- Note the Use automatic settings check box. If
Windows successfully detects a device, this check box is selected,
and the device should function correctly. However, if the resource
settings are based on Basic Configuration <n> (where <n>
is any number from 0 to 9), it may be necessary to change the
configuration by selecting a different basic configuration from the
list. If the particular configuration you want for the device is not
listed as a basic configuration, it may be possible to click the
Setting button to manually adjust the resource
For example, to edit the Input/Output Range setting:
- Click the Use automatic settings check
box to clear it.
- Click Change Setting.
- Click the appropriate I/O range for the device.
To disable a device in Device Manager
, right-click the device, and then click Disable
If the issue continues to occur, you may need to contact the manufacturer of your computer or motherboard to inquire about how to obtain and install a BIOS update for your computer.
For additional information about the error codes that are generated by Device Manager, click the article number below
to view the article in the Microsoft Knowledge Base:
Explanation of Error Codes Generated by Device Manager
For additional information about how to troubleshoot resource conflicts using Device Manager in Windows XP, click the article numbers below
to view the articles in the Microsoft Knowledge Base:
How to Manage Devices in Windows XP
How to Troubleshoot Unknown Devices Listed in Device Manager
If you were unable to resolve your issue by using the steps that are provided in this article, additional troubleshooting help can be found on the following Microsoft Web site:
For help with device problems in Windows Vista, visit the following Microsoft web page: