Computer users have to obey the law, just like anybody else. Since computers are capable of giving great power to their users, a number of laws apply specifically to them.
The Data Protection Act 1998
The Data Protection Act was written to prevent people from misusing personal data (data that can be used to identify a living individual).
The Computer Misuse Act 1995
The Computer Misuse Act is designed to help deal with the problems of computer hackers and viruses.