Computer Device manager is a command to control all the devices or drivers on the windows operating system , In device manager user can view and check all the devices whether they are working properly or not . User can also control the hardware attached to the computer. When user can open device manager the list of hardware can be sorted by various criteria.

1. Device Manager Help
Windows Phone Support
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2. Device Manager
 Device manager is a command to control all the device or driver on the window
operating system , in device manager user can view and check all the device is
working properly or not . User also can control the hardware attached to the
computer. When user can open device manager the list of hardware can be sorted
by various criteria. The step to open device manager is shown below -:

3. Right Click on “ My Computer”
And Choose “ Manage’ Or you
can click on “My Computer”
Icon on Your Desktop
Device Manager

4. Device Manager

5.  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.
Device Manager types of icons

6.  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.
Device Manager

7.  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.
 Please refer to next slides for error codes and their meaning.
Device Manager Error Codes

8. Error
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.
Device Manager Error Codes

9. Error
Code
Meaning
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.
Device Manager Error Codes

10. Error
Code
Meaning
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.
Device Manager Error Codes

11. 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.
Error
Code
Meaning
Device Manager Error Codes