A computer virus is a computer program that can copy itself and infect a computer without permission or knowledge of the user. The term "virus" is also commonly used, albeit erroneously, to refer to many different types of malware (a portmanteau of the words malicious and software) and adware (a portmanteau of the words advertisement and software) programs. The original virus may modify the copies, or the copies may modify themselves, as occurs in a metamorphic virus. A virus can only spread from one computer to another when its host is taken to the uninfected computer, for instance by a user sending it over a network or the Internet, or by carrying it on a removable medium such as a floppy disk, CD, or USB drive. Meanwhile viruses can spread to other computers by infecting files on a network file system or a file system that is accessed by another computer. Viruses are sometimes confused with computer worms and Trojan horses.

 

 

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A worm can spread itself to other computers without needing to be transferred as part of a host, and a Trojan horse is a file that appears harmless. Worms and Trojans may cause harm to either a computer system's hosted data, functional performance, or networking throughput, when executed. In general, a worm does not actually harm either the system's hardware or software, while at least in theory, a Trojan's payload may be capable of almost any type of harm if executed. Some can't be seen when the program is not running, but as soon as the infected code is run, the Trojan horse kicks in. That is why it is so hard for people to find viruses and other malware themselves and why they have to use spyware programs and registry processors.

 

Hard Drive Maintenance:

(Approximate run time is 1-10 minutes)
Run ScanDisk on your hard drive:

1. Start button + Programs + Accessories + System Tools + ScanDisk

2. Select your C: drive from the list of available drives.

3. Select a "Thorough" check (notice the description difference between the two checks).

4. Check the "Automatically fix errors" box.

(Approximate run time is 20 minutes to 1 hour)
Run Disk Defragmentor: (this is intended to be run after a successful ScanDisk has been run).

1. Start button + Programs + Accessories + System Tools + Disk Defragmentor

2. Select your C: drive from the list of available drives.

3. A message may pop up that your hard drive does not need to be defragmented. Ignore this message and continue the process.

4. Find a nice place to relax for 15-45 minutes. If ScanDisk does not finish, but starts over and over again, then contact IT Services.