Leak on the computer

Users questions: 1, if there is important information for a computer, deleted in all cases, the Internet is the likelihood of theft. How to prevent. 2, if a computer does not keep any information, data are used in mobile hard disk, mobile hard disk in the office when processing data. Unplug the Internet when the mobile hard disk. This loss of leak Extent possible. How to prevent. Thank you.
Experts answer: online disclosure generally use those things, or sharing software to download a Trojan horse in the If you delete only the best grinder to use those documents and the like to completely remove the security that is not completely removed before the software can be to restore, This also requires some time, but the network is more difficult to steal a mobile hard disk if the data is relatively safe inside. However, one foot step ahead, we are all human, some means of sophisticated hackers and spyware is not very clear, which in some important sectors of the confidentiality provisions Office computer is not online, the Internet computer is not working. Only data and the network is completely isolated in physics is safe
  • This information provided by the users.Thanks!