Friday 27 August 2010

Black Logon Screen on Windows Server 2003

One of our servers, for some reason, has gone all black on the logon screen. It has been like that for a while. You can still login by typing in the login details "blind", but the logon screen is just completely black, whether via Remote Desktop or the console.

Today I finally decided to google for some info about it. Sure enough it's pretty simple to fix. It is caused by the registry for the default user's color scheme (under [HKEY_USERS\.DEFAULT\Control Panel\Colors]) being set to all zeros. And it can be fixed by setting the registry values to some proper values, for example, by exporting your own set of colors and importing them into the Default User.

Here is the Microsoft support article explaining it all: http://support.microsoft.com/kb/906510.

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