Sophos Endpoint Security and Control installation failed

If the Protect Computers Wizard fails to install Sophos Endpoint Security and Control on computers, it could be because:

• Sophos Enterprise Console does not know which operating system the computers are running. This is probably because you did not enter your username in the format domain\user when finding computers.
• Automatic installation is not possible on that operating system. Perform a manual installation. For instructions, see the Sophos Enterprise Console advanced startup guide.
• The computers are running a firewall.
• “Simple File Sharing” has not been turned off on Windows XP computers.
• The “Use Sharing Wizard” option has not been turned off on Windows Vista computers.
• You selected to install a feature that is not supported on the computers’ operating systems.

For a full list of requirements for the Sophos Endpoint Security and Control features, see the system requirements page on the Sophos website (http://www.sophos.com/en-us/products/all-system-requirements).