Computer VIRUS (Vital Information Resource Under Siege) is one of the big menaces against which computers have to fight. It is a dangerous problem which threatens the problem functioning of the computer. If it is a spread in the computer it makes the computer system behave abnormally or stops or disrupts the operations of the computer. The virus is a self-replicating program which can be multiplied very fast and destroys important executable files.
EFFECTS OF VIRUS:
It can be loss of large amount of data. Different viruses have different effects. Important effects of virus are given ahead.
TYPES OF VIRUSES:
Basic Types of viruses –
Besides these three basic types of viruses, other types of viruses are given below:
LIFE CYCLE OF VIRUS:
The life cycle of a virus starts when it is created and ends when it is completely vanished. Life cycle of a virus is given under the following stages:
ROLE OF ANTI-VIRUS:
Anti-virus loaded on the computer acts as a safety measure from the virus. Anti-virus may detect a virus on being arrival of infected file or may find it during manual command for scans. When anti-virus doesn’t detect any viruses in scanned files; the progress bar shows that the scan is complete. Click close to exit this dialog box. If a virus is detected during the scan, the name of the infected file, the virus detected, and the action taken on the virus appears in the Results list.
When a virus is detected, Anti-virus attempts to complete the action that you designated. If the action fails, Anti-virus performs the second action that was designated for that type of virus and scan.
Actions takes on viruses and risks when you configure scan options are described as follows:
S.NO. | OPTION | DESCRIPTION |
1 | Clean threat | Remove the virus from the infected file. This is the default first action for viruses |
2 | Quarantine risk | Records functions that were performed so that if needed, you can return the computer to the state that existed before Anti-virus removed the risk. |
3 | Delete risk | Deletes the infected file from your computer’s hard drive. |
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