Send an email to the address shown on the screen and attach the Please use an appropriate subject line such as Sophos installation failed and include a brief description of the problem and anything you have already tried (such as uninstalling another product).Note that problems with a departmental or college computer should generally be referred to your local IT Support staff.
NB on Windows 7 the blue shield may not be visible. Solid grey shield This icon is used by Sophos for OS X version 7 and means that on-access scanning is disabled so that Sophos will not automatically be checking for viruses when you open files on your computer. It indicates some sort of problem or action that you need to take. Outline black shield with cross in the centre On OS X systems running Sophos version 8 then if updating fails then you'll see a black shield with a cross in the middle of it. This is used only to notify you of major changes or updates to Sophos.
To view the shield on Windows 7 see the answer to the question Why can't I see the Sophos shield in the Windows system tray (near the clock)? Blue and white shield This icon is used by Sophos for OS X version 8 and means that on-access scanning is disabled so that Sophos will not automatically be checking for viruses when you open files on your computer. This indicates a problem which needs to be investigated and fixed. The most common reason is that Sophos needs you to restart the computer, but it may also indicate a different problem such as on-access scanning disabled. This can happen for a number of reasons, but usually it is because the Sophos client cannot connect to the Sophos servers to update itself. The most common reason is if Sophos tries to update itself before your computer has connected to the internet.
If the Oxford Sophos Antivirus Installer fails to install Sophos for Windows it will display a red shield and the message Install Failed. There can be a number of reasons why the installation fails but the most common reason is that you already have another antivirus software product installed such as a product from Norton, Mc Afee, AVG and others.
If you already have up to date antivirus software installed and protecting your computer then you don't need to install Sophos as well.
If your computer is not connected to the internet you should expect to see updating fail.