Some rules

• To update its operating system and its applications, but only the case or all the applications and the material which you have are in rule (with invoice). The majority of the editors propose updates of safety on line. To avoid any commercial pointing, it is to better do it also on mirror sites which propose updates which were checked.
• To try to sail behind a proxy, if your FAI proposes one of them to you. The advantages are that your numerical identification is trotted less and that many proxy has functionalities of mask which improve the performances
• If one has several machines, to dedicate one of them to connection Internet and another, off-line, with the processing and the storage data.
• If possible to activate the password protection to starting (with this intention, reaching the BIOS)
• To try not to use the most widespread software (Internet To explore, Outlook) and to be wary of the utility software (instantaneous transport, ftp...) which often does not send badly information on Internet for the advertizing.