Sometimes the threat is not from other people , but from natural or technical reasons. Although there is no way to control and prevent such problems , but you can prepare for this situation , the extent of damage to a minimum .
Protect your computer against power surge . In addition to plug the output on your computer and peripherals , some power strip  also protects your computer from the current surge damage . Many power supply board advertising claims if they can not effectively protect your computer will compensate . In the current surge will increase the probability of lightning storms or during the construction period , consider closing the computer and disconnect all power . Just the power supply board is not in the current surge to protect your computer , but there are products in the current surge or power outage to provide uninterrupted power strip  .
Put all your data backup . Whether you take a self-protection measures , the circumstances are always possible damage to your data. You probably had at least one such experience - as an accident , a worm , a natural event , or one of your configuration problems and missing one or more files , backup your data regularly in the CD or network , Which can reduce the loss of important information as a result of stress and other negative consequences (see real-world security warning to ensure that your network for more information ) . Determine the frequency of backup data by each person of their choice. If you continue to increase and modify the data , then a week back the data . Is the best choice; if your content rarely changes , you can choose not to back it up frequently . You do not have a backup stored on CD-ROM and DVD-ROM software - if you install directly from the media on it.