CERN Computer Security Information

Computer Security Awareness Login-Screens

As part of the ongoing computer security awareness raising efforts, the CERN Computer Security Team has produced a series of wallpapers for the Windows O/S login-screen re-iterating the messages of our seven easy good practises. These are intended for use on public PCs, but can be also used elsewhere, and have a resolution of 1920 x 1200 pixel.

These images are at your disposal and can be freely used within CERN. For usage outside CERN, please respect the copyrights of the images. While the images from Microsoft and Yale University can be used when keeping the included attribution, separate licenses must be obtained from In any case, CERN appreciates visible attribution, too.

In order to use one, please copy/paste them in to the "C:\Windows\System32\Oobe\info\backgrounds" folder (you might need to create the "info\backgrounds" part) and rename it to "backgroundDefault.jpg". In addition, change the registry key (REG_DWORD) "OEMBackground" to "1". This key can be found at "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ Authentication\LogonUI\Background". Note that touching the registry must be made with care!

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