Some of the activities that a virus has been programmed to do are:
1. Copy themselves to other programs.
2. Display information on the screen.
3. Destroy data files
4. Erase an entire hard disk
5. Lie dormant for a specified time or until a given condition is met.
Like the viruses that cause cold and diseases in humans, computer viruses do not occur naturally. A virus program may be harmless, simply producing an obscene or silly unexpectedly on the computer screen. But it may also be a very destructive and harmful. It may wipe out huge amount of data or corrupt files on the user's hard disk. Whatever is the motive behind it anger, revenge or intellectual challenge, it is clear that people creating virus do not have respect for other people's hard work.
1. Copy themselves to other programs.
2. Display information on the screen.
3. Destroy data files
4. Erase an entire hard disk
5. Lie dormant for a specified time or until a given condition is met.
Like the viruses that cause cold and diseases in humans, computer viruses do not occur naturally. A virus program may be harmless, simply producing an obscene or silly unexpectedly on the computer screen. But it may also be a very destructive and harmful. It may wipe out huge amount of data or corrupt files on the user's hard disk. Whatever is the motive behind it anger, revenge or intellectual challenge, it is clear that people creating virus do not have respect for other people's hard work.
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