How to Identify Computer Virus Systems

How to Identify Computer Virus Systems

Look for obvious changes

             Look to see if there are any changes to your desktop, your favorites or in the way your computer acts in general. If your desktop icons have moved around or if anything has been added to your desktop, this is a sign you have a virus. Look in the "Add/Remove Programs" section in Control Panel and see if there are any programs that you don't remember installing. Often a virus will install other programs  that will cause problems. If you have a new toolbar in your we browser, this is another sign that you may have a virus.

Disconnect from the Internet

             If your computer acts differently when you are connected to the Internet, that is another sign you have a virus. One of the chief purposes of many viruses is to steal your computer resources. When you're not online, someone on the other end isn't able to get to your resources.

Check your speed

            One of the key ways to know if you have virus is if your computer is running slower. Sometimes the computer will run just a little bit slower, but after having a virus for some time the computer will become extremely slow in everything it does. Disconnecting from the Internet may speed your computer up, but with malicious viruses it may not matter whether or not you are connected to the Internet-the virus will use your resources just to cause you problems.

Beware of errors

            If you are getting strange errors or just more errors that do things like close your programs or cause you to restart your computer, there's a good chance you have a virus. Sometimes errors are normal, but they shouldn't happen constantly. Keep a log of when you get errors, what you were doing when it happened and how bad the error was.

Listen for noise

            If you computer is making a lot of crunching noises accessing the hard drive when you aren't doing anything, then it's likely being controlled by a virus or someone who set up the virus. Most of the time when you're not using you computer it shouldn't be doing anything.

Inspect your security software

           Check to see if your virus software, firewall or Windows updates have been changed or disabled. If you have security but it's not up-to-date or not quite good enough, a virus will disable the software to give itself and other viruses more access.

Virus

Virus

               A computer virus is a computer program that can copy itself and infect computer. The term "virus" is also commonly but enormously used to refer to other types of malware, adware, and spyware programs that do not have the reproductive ability. A true virus can only spread from one computer to another (in some form of executable code) when its host is taken to the target computer; for instance because a user sent it over a network or the Internet, or carried it on a removable medium such as a floppy disk, D, DVD, or USD drive. Viruses an increase their system or a file system that is accessed by another computer.

             The term "computer virus" is sometimes used as a catch-all phrase to include all types of malware. Malware includes computer viruses, worms, Trojans, most root kits, spyware, dishonest adware, crime-ware, and other malicious and unwanted software, including true viruses. Viruses are sometimes confused with computer worms and Trojan horses, which are technically different. A worm can exploit security vulnerabilities to spread itself to other computers without needing to be transferred as part of a host, and a Trojan horse is a program that appears harmless but has a hidden agenda. Worms and Trojans, like viruses, may cause harm to either a computer system's hosted data, functional performance, or networking throughout, when they are executed. some viruses and other malware have symptoms noticeable to the computer user, but many are surreptitious or go unnoticed.

              Computer viruses are the common cold of modern technology. they can spread swiftly across open networks such as the Internet, causing billions of rupees worth of damage  in a short span of time. Some viruses can be very destructive; they can format your hard drive, overwrite your hard drive boot sector, or delete files and render your machine inoperable.

1. Viruses enter your system via e-mail, downloads, infected floppy disks, or (occasionally) hacking.

2. By definition, a virus must be able to self-replicate (make copies of itself) to spread.

3. Thousands of viruses exist, but few are found "in the wild" (roaming, unchecked, across networks)     because most known viruses are laboratory-made, never released variations of common "wild"           viruses.

4. Virus behavior can range from annoying to destructive, but even relatively benign viruses tend to       be destructive due to bugs introduced by sloppy programming.

5. Anti-Virus software can detect nearly all types of known viruses, but it must be updated regularly to maintain effectiveness

Primary Connectors on the motherboard

Primary Connectors on the motherboard

                Power - A 20 or 24 pin connector i being connected to the ATX connector to accept a plug from the power supply. This plug carries DC power to all the circuits on the motherboard.

                Keyboard - A Mini-din 6-pin purple color round connector found at the back of the motherboard is the connector where keyboard is being plugged in.

                Mouse - This connector is not included into the motherboard but is built-in in this list since its task is very compulsory. It is a 15-pin, D-shell type connector specially found on a video card which the user have to install into the AGP connector of the motherboard which is in brown color and as today the motherboard are being highly developed and the VGA connectors are also inbuilt available in the motherboard and the even the AGP slots are being replaced by PCI Express slots which are being denoted in white color.

                IDE- The IDE are termed as Integrated Drive Electronics. These are 40 pin connectors that make available a place to connect the ribbon cables from the hard drives and also the CD or DVD ROM drive. All data among the motherboard and the drives is being passing on through these cables.

                FDD connector - It is like function to the IDE connector. It is a 34 pin ribbon connector that passes data among the motherboard and any floppy drive installed in the Computer. And the connector is in white color.

               DRAM - DRAM consists of Dynamic Random access Memory connectors especially for SIMM and DIMM type of memory modules. And confirm before installing the RAM whether the motherboard supports the DDR1 or the DDR2 memory module.

Serial connectors

              Standard Serial Connector - This connector has been about in PCs since they first appeared. It was initially located on ISA expansion type cards. Nowadays it is an essential part of latest motherboards. It is a 9-pin, D-shell connector that agrees to you to connect external devices with serial ports to your PC. The maximum data rate is 115 KB/s.

              USB - Universal Serial Bus- This is a comparatively new serial bus. Formerly specific as low speed, 1.2 Mb/s, it was improved to full speed, 12 Mb/s. The latest version 2.0 is specified as high speed of more than 400 MB/s. One day the USB will finally change the standard serial connector that has been the workhorse serial port in previous computers. At Present USB are the average connectors on all the latest motherboard available in the market. Not like the serial and parallel ports, the USB port is designed to power devices connected to it. The devices must be low power devices and must be able to reduce their current draw to less than 0.5uAmps when commanded to do so by the PC.

Parallel Connectors

               Centronix or Standard Parallel - This connector has been about in computers since they first emerged. It has 37-pins and is now included on recent motherboards. It is frequently used to attach your printer to the PC and moves data at speed of about 1MB/s.

               SCSI - The SCSI is being termed as Small Computer System Interface which sends the data at a maximum speed of up to 80Mb/s. It not included into most computer motherboards. It can be installed in a computer in a form of Expansion card. With the help of this card the user can connect around seven hard drives in one computer.

               Expansion Card Connectors - The CPU is being connected to expansion card connectors through one of the chip set ICs mentioned above. They are situated on the motherboard near the back of the computer. These connectors permit special utility cards to plug into and work with the computer. Before motherboards incorporated the serial and centronix connectors were found on expansion boards that plugged into ISA slots.

The Components of Motherboard

The Components of Motherboard

               The motherboard is the foundation on which a PC is built. It provides the interconnecting circuitry through which the primary components of the motherboard receive their power and pass control signals, data, addresses, and instructions to each other. In short, with a shows where the major components are found on a typical motherboard.

               CPU- The CPU (Control Processing Unit) is often seen in the motherboard as it is the main core of every computer. All arrangement, calculation and control happen here.

               BIOS - BIOS means Basic Input Output System which is a non-volatile memory that includes configuration details about the computer. It includes all the system required for the CPU to converse with the keyboard, mouse video display, hard drives and also other connections devices. When a PC is power-driven on it uses the BIOS 'boot code' set up much essential task that gets the Computer to a point where it is set to work.

              RTC - RTC means Real Time Clock or it is mostly called as CMOS chip which maintains the date, day and time in a 24 hour format just like your watch. The computer uses this clock to 'time stamp' files as they are produced and customized. Whenever the user print a file it time stamps the pages as they are printed.

             ChipSet - These are big chip(s) that combine many tasks which are used to create in split into smaller chips on the motherboard. As they save lots of space and cost. The task completed by these chipsets frequently not working into two strategy with one if an interface from the CPU to the memory and the other providing controllers for IDE, ISA, PCI and USB devices.