File:Disabled.png
Hardware not working properly
Hardware may not work properly for a multitude of reasons. 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.

File:Hardware notworking.png
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.
File:Notrecognized.png
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.
* Code 1 - This device has not been configured correctly.
* Code 3 - The driver for this device may be corrupted, or your system may be running low on memory.
* Code 10 - This device cannot start.
* Code 12 - Not enough resources for the device.
* Code 14 - You must restart your computer for the device to work properly.
* Code 16 - Windows can't identify all the resources this device requires.
* Code 18 - Drivers for this device must be reinstalled.
* Code 19 - Configuration information in Windows registry is damaged or corrupted for this device.
* Code 21 - Windows is removing this device.
* Code 22 - This device is disabled.
* Code 24 - This device is not present, does not have all its drivers installed, or is not working properly.
* Code 28 - The drivers for this device are not installed.
* Code 29 - The firmware of the device did not give it the required resources.
* Code 31 - Windows cannot load the drivers required for this device.
* Code 32 - A driver for this device has been disabled.
* Code 33 - Windows cannot determine which resources are required for this device.
* Code 34 - Windows cannot determine the settings for this device.
* Code 35 - Your computer's firmware does not include enough information to properly configure and use this device.
* Code 36 - This device is requesting a PCI interrupt but is configured for an ISA interrupt (or vice versa).
* Code 37 - Windows failed to initialize the device driver for this hardware.
* Code 38 - Windows cannot run the driver for this device because a previous instance of the driver exists.
* Code 39 - Windows cannot load the driver for this device. The driver may be corrupted or missing.
* Code 40 - Windows cannot access this hardware because its service key information in the registry is missing or corrupted.
* Code 41 - Windows successfully loaded the device driver for this hardware but cannot find the hardware device.
* Code 42 - Windows cannot run the driver for this device because there is a duplicate device already running in the system.
* Code 43 - Windows has stopped this device because it has reported problems.
* Code 44 - An application or service has shut down this hardware device.
* Code 45 - This hardware device is not connected to the computer.
* Code 46 - Windows cannot gain access to this hardware device because the operating system is in the process of shutting down.
* Code 47 - Windows cannot use this device because it has been prepared for safe removal, but it has not been removed from the computer.
* Code 48 - The driver for this device has been blocked from starting because it is known to have problems with Windows.
* Code 49 - Windows cannot start new hardware devices because the system hive is too large and exceeds the Registry Size Limit.
* Code 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.