Damage to computer hardware by viruses

CIH virus to make everyone panic, set off a small waves. The previous various viruses can only destroy hard disk data, while CIH can invade the flash BIOS on the motherboard, destroy its contents and make the motherboard scrap. CIH's lesson tells us: Do not underestimate the damage of the virus to the hardware. Many people are now worried: cih more and more ferocious, at the same time will there be more hardware-destroying virus? In fact, I analyzed. The "means" by which the virus destroys hardware is the following:

1. Damage Monitor

As we all know, each monitor has its own bandwidth and highest resolution, field frequency. Early production of the 14-inch color display, the bandwidth of about only 35-45mhz, the corresponding highest resolution is 1024x768@60hz field frequency, the current 14-inch color display, the bandwidth is mostly 60MHz, the corresponding highest resolution of 1024x768@75hz field frequency; 15-inch color display (high-end), 110MHz bandwidth, corresponding to the highest resolution of 1280x1024@85hz field frequency. You can check the display of the instructions, above all have the field frequency and the highest resolution of the match. If one of the above, there will be a flower screen, serious will burn the display. Viruses can tamper with display parameters to damage the display (such as the resolution, farmyard frequency to the graphics card can support the most high-end, etc.). Although the new Monitor has DDC standardization and system contact, but the virus is not difficult to exploit the loopholes. Therefore, if you find that the display in the use of a flower screen, to immediately turn off the power of the monitor, restart and then enter Safe mode to find the reason.

2. FSB, voltage-destroying CPU, video card, memory, etc.

At present, new motherboards using "soft jumper" more and more, this just give the virus to the opportunity. The so-called "soft jumper" refers to the BIOS can change the CPU voltage, FSB and frequency multiplier. The virus can change the BIOS parameters, heightening the CPU voltage to overheat and burn, or improve the CPU FSB, so that CPU and video card, memory and other peripherals overload work and overheating burn. The precursor to such an event is a panic. So, if you find that the machine often freezes, we must hurry to the CMOS to see if the above parameters have changed. Fortunately, at present, many motherboards have CPU temperature monitoring function, over-temperature immediately after the frequency of alarm, you can basically eliminate the situation of burnout hardware.

3. Super "show frequency" damage video card

At present, many high-end graphics cards can manually change the frequency of their chips, and change the method is simpler: In the Windows registry changes. The virus changes the "show frequency", the video card is apt to overload work and burn out. The precursor of such an event also freezes. Therefore, do not ignore the crash when the "show frequency" check. There is also a way to reduce the likelihood of burnout, that is ... (what?) you've got two fans!?

4. Destroy the optical drive

The bald head in the optical drive will increase the laser power when the signal is not read, so the long life of the light drive is very unfavorable. Some people do experiments, so that the normal CD-ROM constantly read a lot of scratches, weak signal disc, 28 Hours later the CD-ROM will be finished. The virus can let the bald head go to the disc Edge no signal area Non-stop reading disk, the results of the bald-headed read the signal, then increase the power to read, not for a few days, the optical drive will be "no Disc". So always pay attention to the flash of the optical drive lights, to determine whether the optical drive is working properly.

5. Destroy the motherboard, the flash BIOS of the video card

This is the way the CIH virus destroys the motherboard today. The virus used garbled text to flush out the contents of the BIOS so that the machine could not start. But now many motherboards have a flash BIOS write protection jumper, can effectively prevent CIH virus damage to the motherboard. But don't forget, a lot of graphics cards also have flash bios, and maybe one day there will be a virus that destroys the graphics bios. So it's better to be careful, but there's no specific cure.

6. Destroy the hard drive

As we all know, partitions, advanced formatting on the hard disk is not any damage, but low-level formatting on the hard disk life has a greater impact. It is said that the hard drive to do 10 times low-level format will be scrapped. If a virus occurs, keep the 0 track of the hard drive to do low format (do 10 times at most only in a few seconds!), 0 Bad and then do 1 ... Your hard drive capacity will be 1.1 points (this is not small!) To be eroded, and 0, 1, 2 ... If you want to use the hard drive again, you'll have to reset the starting track in the BIOS, then the low-level format, very troublesome.

In fact, the virus has a very simple and effective prevention method, that is, the BIOS in the boot Sectorvirus Protection (boot zone virus write protection) set to enable (open). The author has done experiments, the above switch open, the use of a variety of low-level format software (including the BIOS with its own) to the hard drive low lattice, the BIOS will be alerted (reported that the program attempts to rewrite the boot zone, ask whether to continue), press n can be prevented. To know that the BIOS program is in charge of the highest control of the system, there should be nothing to break through the perimeter (you press Y is another thing). If you find the above situation, quickly reset, and then antivirus, however, if you are in the win 98 and other * systems or system Commander software encountered this situation, you can not ignore it, stranded for these software installation have to rewrite the boot zone. But advise you to install these software is best to write protection off, otherwise prone to panic phenomenon!

7. Wasting ink on inkjet printers

Inkjet Printer's nozzle is particularly easy to plug, the printer company specially invented a special waste ink "cleaning nozzle" function, that is, let a lot of ink out of the sprinkler, clear debris. This function can be implemented with software control, and then the virus will be unknown to the caller calls the function, and you are to the printer groan but listen to not see. When you find out, a lot of ink has been wasted. The only way to prevent this virus is ... The printing authority is not used without the printer. In fact, as long as you often pay attention to the printer mode lights on it, cleaning the sprinkler is usually a shiny. Also listen carefully to the groan, and the printhead will always have to walk back and forth (for heating) when cleaning the sprinkler head.