virus means.how it is prepared,how it can attached to a user required files.characteristics , propertice of it
477930
http://www.vw.vccs.edu/police/Pages/virusfaq.html
20863
Viruses are kind of program but hacker intend to creat it for destroying the computer component. :)
1039244
It's a malformed file that contains harmful code that will cause problems to your computer.You shoul delete or quarantine that file.
324354
virus is nothing but its all an illigal programs everyone can create virus if you know where do have to give effect
650521
You will need a anti virus software that has real time scanning, the best one that I use is NOD32 and it can be found here. http://www.eset.com/index.php\n\nIf you want to check single files perhaps an email attachment, then if you go to this site and submit the file or even email it to them then they will give you a full assessment on its risk and any viruses inside.\nhttp://www.virustotal.com/en/indexf.html
611097
ppl!!! plz give complete info, like operating system, and extention of file,\n\nif its windows, just click on the file , then it will give u an option to find the\n\nappropriate program to open that file on the internet,\n\ngo there and download the file, its probably compressed, \n\nand always have a antivirus software installed in case its a virus
1109237
A dangerous computer program with the characteristic feature of being able to generate copies of itself, and thereby spreading. Additionally most computer viruses have a destructive payload that is activated under certain conditions.\n\nA computer virus is a self-replicating program containing code that explicitly copies itself and can "infect" other programs by modifying them or their environment such that a call to an infected program implies a call to a (possibly evolved) copy of the virus
764608
even programs such as virtual pc contain software 'bridges' to connect to the operating system and the internet 'outside' of the virtual machine.\n\n*most* viruses aren't as sophisticated or clever as people may think, their actions are fairly predictable so if they end up in a virtual machine which hasn't had outlook express or programs like limewire installed they will be crippled and unable to spread in their usual way.\n\nif you're planning on setting up a virtual machine with an internet connection and file sharing programs and such you're increasing the chances that a virus can prosper by getting itself back out onto the internet.\n\nthe advantage of a setup like that is that you can just delete a virtual machine and replace it from a backup withou worrying.
494683
Usually virus's are programs to attack different fields of the computer.  If it is a trojan horse then it will be sleeping on your computer waiting for you to hit the Requirement(could be a folder, or type a leter of number, etc.) that was set to release the virus into your computer to do the damage.
492856
a host.\n\nA virus is a submicroscopic parasitic particle that infects cells in biological organisms. The study of viruses is virology.\n\nViruses are obligate intracellular parasites that lack the cellular machinery for self-reproduction. Viruses infect eukaryotes and prokaryotes such as bacteria; viruses infecting prokaryotes are also known as bacteriophages or phages. Typically viruses carry a small amount of genetic material, either in the form of DNA or RNA or both, surrounded by some form of protective coat consisting of proteins, lipids, glycoproteins or a combination. The viral genome codes for the proteins that constitute this protective coat, as well as for those proteins required for viral reproduction that are not provided by the host cell.\n\nViruses are non-living particles that can only reproduce when an organism reproduces the viral RNA or DNA. Viruses are considered non-living by the majority of virologists because they do not meet all the criteria of the generally accepted definition of life. Among other factors, viruses do not move or metabolize on their own. However, a comprehensive definition of life is still somewhat elusive since some bacteria (considered living) like rickettsia exhibit both characteristics of living and non-living particles.\n\n\nLife cycle\nAttachment, sometimes called adsorption: The virus attaches to receptors on the host cell wall. \nInjection: The nucleic acid of the virus moves through the plasma membrane and into the cytoplasm of the host cell. The capsid of a phage, a bacterial virus, remains on the outside. In contrast, many viruses that infect animal cells enter the host cell intact. \nTranscription: Within minutes of phage entry into a host cell, a portion is transcribed into mRNA, which is then translated into proteins specific for the infecting phage. \nReplication: The viral genome contains all the information necessary to produce new viruses. Once inside the host cell, the virus induces the host cell to synthesize the necessary components for its replication. \nAssembly: The newly synthesized viral components are assembled into new viruses. \nRelease: Assembled viruses are released from the cell and can now infect other cells, and the process begins again. \nWhen the virus has taken over the cell, it immediately causes the host to begin manufacturing the proteins necessary for virus reproduction. Some viruses, like herpes, cause the host to produce three kinds of proteins: early proteins, enzymes used in nucleic acid replication; late proteins, proteins used to construct the virus coat; and lytic proteins, enzymes used to break open the cell for viral exit. The final viral product is assembled spontaneously, that is, the parts are made separately by the host and are joined together by chance. This self-assembly is often aided by molecular chaperones, or proteins made by the host that help the capsid parts come together.\n\nThe new viruses then leave the cell either by exocytosis or by lysis. Envelope-bound animal viruses cause the host's endoplasmic reticulum to make certain proteins, called glycoproteins, which then collect in clumps along the cell membrane. The virus is then discharged from the cell at these exit sites, referred to as exocytosis. On the other hand, bacteriophages must break open, or lyse, the cell to exit. To do this, the phages have a gene that codes for an enzyme called lysozyme. This enzyme breaks down the cell wall, causing the cell to swell and burst. The new viruses are released into the environment, killing the host cell in the process
858511
Take the above answers with a grain of salt...\n\nHere's the basics.  A virus (or malware - I'll just use the term virus) most often gets on your system via a file, in your case from a spam email, that you then execute (you can also get them through OS or browser bugs, but it's the same concept).  Once executed, the virus is free to do whatever it was programmed to do.\n\nYou're free to delete that original downloaded file with no damage resulting.  BUT...you've run it, and it's possibly elsewhere in your system...your system is compromised.  The virus can attach itself to any file it wants, including system files, and if these are deleted, your system can get damaged.\n\nFirst, I would run a Housecall scan (antivirus), then install and run an anti-spyware product, then install a (free?) anti-virus.
437964
Motherboard, Hard drive etc. The internal components of your computer.\nSoftware is a program like Anti-Virus that you install into the Hardware.
185395
In order to make Windows more friendly and feature rich, M$\nmade some trade-offs which make Windows more susceptible to\nviruses.\n\nFor example, Linux/Unix/Solaris has a baked-in notion of\npermissions and ownerships.  If a regular user downloads a\nvirus in an email, it generally won't have the ability to\nover-write the file system or the boot block.  On a Windows\nsystem, it's common for the only user to simultaneously be\nthe "administrator", so everything is left wide open, all\nthe time.\n\nContributing to this are some "features" in the M$ software\nwhich all but *invite* virus writers.  Consider the notion \nof "Outlook" being configured, *by default*, to execute\nattachments when the user just reads the message (ie.\nwithout even explicitly selecting the attachment).  Or\nconsider the thought processes that went into the decision\nto allow an *image file* to invoke a process when it is\nviewed.  Sure, it permits some really cool tricks (like\nanimated sprites on a map), but OMG it means you can\nexecute a virus just by viewing an image!\n\nThere's no inherent reason that a Linux (or Solaris)\ndeveloper couldn't be that bone-headed, but fortuntely,\nthere are lots of people **looking at the source code**,\nso hopefully that kind of blunder would be caught.\n\nSo while the Unix OS's are not guaranteed to\nbe immune to viruses, they do tend to be much\nmore resistant (more security conscious applications)\nand the effects are significantly reduced (because\nthe effects are limited to a single user's\npermissions).
228625
A virus is a malicious piece of software they infects your computer.  It can range from just an annoyance to a program that deletes files off your hard drive.  A worm is a virus that replicates itselfs and sends itself out to toher computers.  It may gather all email addresses on your computer and send itself out to all of them without your knowledge.  SPAM is unsolicited junk email.\n\nAVG has a free anti-virus programs: http://free.grisoft.com/doc/1/\n\nhttp://free.grisoft.com/doc/1/
324872
Legal: complying with law.\n\nLegitimate: fair, morally or ethically acceptable.\n\nIt may be legal to infect a computer with a virus, if there is still no law against it. But it isn't legitimate.\n\nGay marriage is not legal in some places, but some people think that they have a legitimate claim for it to become legal.
4620
A trojan is a program that does something cool or useful, or at least it pretends to, but at the same time it secretly infects the computer with a virus and/or opens a backdoor to let the computer be remotely controlled, or simply damages the system, e.g. deleting files.\nMore info at http://en.wikipedia.org/wiki/Trojan_horse_(computing)
98767
virus work:\nmost likely virus in the real world\n\nanti virus work:\nscanning files/memories comparing every bit with "signature" that already known in the virus database.\nthen do whatever it should take (delete/cure/quarantine)