Prevent virus

1.Check your hardware and software regularly
2. Back up data regularly
3. Prepare clean boot disc.
4. Install antivirus program
5. Detect abnormal eg. abnormal noise

What do virus do?

1. Boot secter can be damage and you cannot boot from hard disk or system disk.
2. Document file will be destroy and cannot be recovered.
3. Change your file size and distorted it.
4. Slow down your computer.
5. Program use are interrupted.
6. Decrease memory unit.
7. System configuration can be damage.

Virus

1. Boot virus - every time we open computer, our operating system will read and load this virus into memory unit and can spread to any disc
2. File virus-attached with program file. Start working when we open this file
3. Macro virus-attached with document file, capable to use macro automatically
4. Trojan-attached with E card, E mail, Internet download program
5. Worm- rapidly destroyy your computers

computer virus

Computer virus is the invading program into other computer without permission, in order to damage that computer.