Device Manager
The Device Manager is a Control Panel applet in Microsoft Windows operating systems. It allows users to view and control the hardware attached to the computer. When a piece of hardware is not working, the offending hardware is highlighted for the user to deal with. The list of hardware can be sorted by various criteria.
For each device, users can:
- Supply device drivers
- Enable or disable devices
- Tell Windows to ignore malfunctioning devices
- View other technical properties
Device Manager was introduced with Windows 95 and later added to Windows 2000. In NT-based versions, it is included as a Microsoft Management Console snap-in.
Types of icons
Disabled device
A disabled device has either been manually disabled by a user or by some way of error. In Windows 95 through XP, this is denoted by a red X. In Windows Vista and Windows 7, this was replaced by a grey downward pointing arrow in the lower right-hand corner of the device's icon.
Hardware not working properly
There are many reasons why hardware may not work properly. If Windows recognizes a problem with a device, it is denoted by a black exclamation point (!) on a yellow triangle in the lower right-hand corner of the device's icon.
Hardware not recognized
Hardware may not be recognized if it is not installed properly or not compatible with your system. This is denoted by a yellow question mark in place of the device's icon.
Device manually selected
A blue "i" on a white field in the lower right-hand corner of a Device's icon 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.
Error Codes
Device Manager error codes are numerical codes, accompanied by an error message, that help users determine what kind of issue Windows is having with a piece of hardware.[1]
| Code | Meaning |
|---|---|
| 1 | This device has not been configured correctly. |
| 3 | The driver for this device may be corrupted, or your system may be running low on memory. |
| 10 | This device cannot start. |
| 12 | Not enough resources for the device. |
| 14 | You must restart your computer for the device to work properly. |
| 16 | Windows can't identify all the resources this device requires. |
| 18 | Drivers for this device must be reinstalled. |
| 19 | Configuration information in Windows registry is damaged or corrupted for this device. |
| 21 | Windows is removing this device. |
| 22 | This device is disabled. |
| 24 | This device is not present, does not have all its drivers installed, or is not working properly. |
| 28 | The drivers for this device are not installed. |
| 29 | The firmware of the device did not give it the required resources. |
| 31 | Windows cannot load the drivers required for this device. |
| 32 | A driver for this device has been disabled. |
| 33 | Windows cannot determine which resources are required for this device. |
| 34 | Windows cannot determine the settings for this device. |
| 35 | Your computer's firmware does not include enough information to properly configure and use this device. |
| 36 | This device is requesting a PCI interrupt but is configured for an ISA interrupt (or vice versa). |
| 37 | Windows failed to initialize the device driver for this hardware. |
| 38 | Windows cannot run the driver for this device because a previous instance of the driver exists. |
| 39 | Windows cannot load the driver for this device. The driver may be corrupted or missing. |
| 40 | Windows cannot access this hardware because its service key information in the registry is missing or corrupted. |
| 41 | Windows successfully loaded the device driver for this hardware but cannot find the hardware device. |
| 42 | Windows cannot run the driver for this device because there is a duplicate device already running in the system. |
| 43 | Windows has stopped this device because it has reported problems. |
| 44 | An application or service has shut down this hardware device. |
| 45 | This hardware device is not connected to the computer. |
| 46 | Windows cannot gain access to this hardware device because the operating system is in the process of shutting down. |
| 47 | Windows cannot use this device because it has been prepared for safe removal, but it has not been removed from the computer. |
| 48 | The driver for this device has been blocked from starting because it is known to have problems with Windows. |
| 49 | Windows cannot start new hardware devices because the system hive is too large and exceeds the Registry Size Limit. |
| 52 | Windows cannot verify the digital signature for the drivers required for this device. A recent hardware or software change might have installed a file that is signed incorrectly or damaged. |
See also
References
External links
- Displaying detailed information in Windows XP device manager
- Displaying unconnected devices in Windows XP device manager
- The DevCon utility
- Microsoft Device Manager error codes
