Fujitsu Siemens Computers Fujitsu-Siemens PC - Manual (Page 72)

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... for using antiviral software
Fujitsu Siemens Computers systems are always supplied with pre-
installed antiviral software. If you have completely set up the
antiviral software and you decide to purchase another piece of
antiviral software, you must always uninstall the fully installed
antiviral software properly first. Otherwise, installation of a second
piece of antiviral software without previously uninstalling the
existing software may be successful but could lead to severe
software conflicts.