interview question and answer

November 17, 2012

The logon screen turns black after you press CTRL+ALT+DELETE to log on to a Microsoft Windows Server 2003-based computer


After you press CTRL+ALT+DELETE to log on to a Microsoft Windows Server 2003-based computer, the logon screen turns black. Although you cannot see what you are typing, you can successfully log on to the Windows Server 2003-based computer. Then, after you successfully log on, the screen becomes visible.

Note
 This symptom may occur on both the terminal server sessions and the local console. Additionally, this symptom occurs even if you start the computer in Safe mode.

This issue occurs if all the values under the following registry subkey are set to "0 0 0":
HKEY_USERS\.Default\Control Panel\Colors
Note The value data "0 0 0" means black.

Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 How to back up and restore the registry in Windows


To work around this issue, perform the following procedures.
Export the registry subkey from another Windows Server 2003-based computer
1.       Click Start, point to Run, type regedit in the Open box, and then click OK.
2.       Locate the following registry subkey:
HKEY_USERS\.Default\Control Panel\Colors
3.       Right-click the Colors registry subkey, and then click Export.
4.       In the File name box, type a name for the file.
5.       Note the location where you will save the file, and then click Save.
Import the registry subkey into the affected computer
1.       Click Start, point to Run, type regedit in the Open box, and then click OK.
2.       On the File menu, click Import.
3.       Double-click the .reg file that you want to import.
4.       Quit Registry Editor, and then restart the computer.

The value data for color registry values are in the xxx yyy zzz format, where xxx yyy zzz represents the red-green-blue (RGB) values for a color. For example, 0 0 0 is solid black and 255 255 255 is solid white. The following table lists the default values for the HKEY_USERS\.Default\Control Panel\Colors registry subkey.
Value name
Value data
ActiveBorder
212 208 200
ActiveTitle
10 36 106
AppWorkSpace
128 128 128
Background
102 111 116
ButtonAlternateFace
181 181 181
ButtonDkShadow
64 64 64
ButtonFace
212 208 200
ButtonHilight
255 255 255
ButtonLight
212 208 200
ButtonShadow
128 128 128
ButtonText
0 0 0
GradientActiveTitle
166 202 240
GradientInactiveTitle
192 192 192
GrayText
128 128 128
Hilight
10 36 106
HilightText
255 255 255
HotTrackingColor
0 0 128
InactiveBorder
212 208 200
InactiveTitle
128 128 128
InactiveTitleText
212 208 200
InfoText
0 0 0
InfoWindow
255 255 225
Menu
212 208 200
Menubar
212 208 200
MenuHilight
210 210 255
MenuText
0 0 0
Scrollbar
212 208 200
TitleText
255 255 255
Window
255 255 255
WindowFrame
0 0 0
WindowText
0 0 0


Note:- Second solution :- Install VGA Drivers If VGA already install in your pc then again install it.

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