Disadvantages of computer
The main disadvantages of computer arise from its technical nature.
• Computer errors. These are not easy detected, and may not even be apparent until some time to late to rectify such errors.
However, most of computers errors, are human mistakes, which are blamed on the computer. Some of these errors are rise out of negligence erroneous data or political reasons.
• It’s errors could be fatal as in the case of shooting down of an Iranian airliner in the in golf. In 1986, by an American, which was blamed on the failure of their computer to give proper information about the aircraft,. Or where The computer is used to monitor the condition of the patient in hospital, any failure on the parts of the computer system may lead to the patient death.
• it requires specialized knowledge for its operations.
• It makes people lazy, as the underlying logic in solving problems is now ignored.
• With the application of computers in virtually. All field of human endeavor, and the ability of computer system to carry out tasks effectively, which results.it will A lot of people to lose their job and become unemployed. Therefore, creating unemployment in the labour market

• Corruptions
Some people are using the cyber cafe, , not for the sake of research, but for the purpose of perpetrating “evil 419 scandal”, and other related offenses
• Cybercrime: also known as computer crime. The use of the computer, as an instrument to further illegal ends such as committing fraud, trafficking, in child pornography and intellectual property. Stealing identities or violating privacy. cybercrime, especially to the internet has grown in importance as, especially through the internet has grow in importance as the computer has become central to commercial entertainment and governments .

• Types of cyber crime

• Internet fraud

schemes to defraud customers abound on the internets among the most famous in the Nigerian or 419 scam. The number is a reference to the section of Nigerian law that discount violets. Although this corn has been used with both fax and traditional.
Mail, it has been given new life by the internet in the scheme, An individual, receive an email, asserting that the sender requires help in transferring a large sum of money out of Nigeria, or another distant country. Usually, this money is in the form of assets that is going to be sold. Such as oil, or a large amount of cash. That requires “ Laundering” to conceal its source , the variation and endless. A new specific are constantly being developed.
The message asking the recipient to cover some costs of moving the funds out of the country. In return for receiving a much large sum of money in the near future.
Should the recipient respond with a check or money order he is told that complication have developed, more money is required, over time, victims, can lose thousands of dollars that are utterly recoverable
• ATM fraud.