Virus, worm, trojan ........ what is the different between them?
961792
All 3 are malware of one form or another.  They vary in how they infect a system, and whether or not they can replicate themselves to other systems.\n\nViruses are "parasites" - they attach to files (executables, Word macros, etc).  They self-replicate, but require some sort of user interaction to infect a system (opening a document, running a program, etc.)  Typically, viruses alter the program they're attached to in order to run their commands.\n\nWorms are standalone - they attack system vulnerabilities (such as network services).  These self-replicate, and require no user interaction - which leads to them spreading quickly.\n\nTrojans are, like the original trojan horse, not what they seem.  They're the bait-and-switch model - programs that claim to do one thing while doing something else.  These do not replicate, and require user intervention to infect a system.
692373
There is no such. I needed to re-install my PC just a few days ago and when I made a connection to Internet it was flooded with worms. I thought my PC-Cilin antivirus was good enough, but it couldn’t protect me. I downloaded AVG, Avast!, Ad-Aware, SpyBot… etc., and all of them found something. I recommend you to have numerous software to protect you.
879983
well as malware is not the same thing as virus, anti-virus software can not delete it. try some antispyware tools:\nhttp://www.2-spyware.com/anti-spyware
1143555
Use the internet and the search engines like google,yahoo or  books about viruses and use encarta since that might help you.\n\nGood luck
771859
Here you have some good and free antivirus programs: http://askcomputerexpert.ws43.com/download/security.htm\nGet one!
1058516
Let's explain this in human terms- \n\nA virus to a computer is like a viral infection to a human.  It is like the air bound bacteria that travels through the air that cause us to get ill if contacted- such like a common cold.  Unlike us, a computer doesn't have a natural immune system to protect it from bad elements, and that why an Up-To -Date Anti-Virus Program with  auto-updating virus definitions is very essential.  Computer viruses and all other pest and scary crawlers are all over the virtual web.  \nA computer can easily catches a virus by us clicking on a link, more opening a document that already has a virus in it, etc....  Consequently, the level of damages a virus can do to a PC depends on its incubation period(how long b4 noticed) and its characteristics(the purpose in nature. ex- keylogger, hacker, etc...).  A general virus symtoms are 1.  Your PC runs extremely slow all of a sudden. 2. changes in display resolutions.  3. frozen. and 4. "if it sneezed."  HA!  HA!\nI have a theory that computer viruses is evolving although there hasn't been proofed facts about computer virus mutations.  By observing the similarities of different viruses' habitats and the linkages btw their family trees(1), I came with the theory that many new viruses are actually evolved from the previous ones within that family.  Relevantly, other more serious bugs like worms, swans, and etc are actually albinos mutated from the many virus families; which is one of the reasons why these are harder to get rid.
115654
People often confuse viruses with spyware. Check out Microsoft AntiSpyware.
700204
Norton is a piece of crap as you can see. Here you have some good and free antivirus programs:\nhttp://askcomputerexpert.ws43.com/download/\nGet one!
1180193
It's a real problem. Does not matter what is the worm, it blocks your attemts to get rid of it. Try link below: maybe, your worm/virus still does not know it.\n!!! One thing more: you *have* to install some antivirus and firewall software. In any other case, you will get such dirt again and again.
1081863
Everything starts working properly.\n\nAlso, AVG will tell you what trojan was there and  put it in a vault and you delete it.\n\nGood Luck
124152
viruses is too general.\n\nTrojans spread by hiding inside other things, usually email, though email is not the only vector.\n\nspyware does not usually attempt to spread once on your system....however, they use trojans/worms to open backdoors on the PC, and THEY will sometimes spread.  spyware comes in 2 flavors, broswer monitoring, and keyloggers-programs that record every keystroke pressed and send it via internet to a 'bad guy' somewhere. useful for collecting personal info and passwords, financial etc.\n\nhope this helps !
641300
Oh, and Phishing! How does that work? And how do I set up a Trojan Horse? And what is the best way to run a distributed DOS attack?\n\nWOW! Isn't the internet FUN boys and girls?
924999
hmmm worms. well you probably should be running a virus scanner and a firewall to begin with. otherwise look on http://www.download.com for :\n\nspybot\n\ndownload, install and run. this should help.
606976
you probably mean trojan horse, and you should buy or download some decent anti virus software. Try download.com
472568
Antivirus=Norton Antivirus\nAntispyware=Webroot Spy Sweeper
44656
In computer security technology, a virus is a self-replicating program that spreads by inserting copies of itself into other executable code or documents. A computer virus behaves in a way similar to a biological virus, which spreads by inserting itself into living cells. Extending the analogy, the insertion of a virus into the program is termed as an infection, and the infected file (or executable code that is not part of a file) is called a host. Viruses are one of the several types of malicious software or malware. In a common parlance, the term virus is often extended to refer to worms, trojan horses and other sorts of malware, however, this can confuse computer users, since viruses in the narrow sense of the word are less common than they used to be, compared to other forms of malware. This confusion can have serious consequences, because it may lead to a focus on preventing one genre of malware over another, potentially leaving computers vulnerable to future damage. However, a basic rule is that computer viruses cannot directly damage hardware, but only software.\n\nWhile viruses can be intentionally destructive (for example, by destroying data), many other viruses are fairly benign or merely annoying. Some viruses have a delayed payload, which is sometimes called a bomb. For example, a virus might display a message on a specific day or wait until it has infected a certain number of hosts. A time bomb occurs during a particular date or time, and a logic bomb occurs when the user of a computer takes an action that triggers the bomb. However, the predominant negative effect of viruses is their uncontrolled self-reproduction, which wastes or overwhelms computer resources.\n\nToday (as of 2006), viruses are somewhat less common than network-borne worms, due to the popularity of the Internet. Anti-virus software, originally designed to protect computers from viruses, has in turn expanded to cover worms and other threats such as spyware.\n\nDefinition:\n===========\nA virus is a type of program that can replicate itself by making (possibly modified) copies of itself. The main criterion for classifying a piece of executable code as a virus is that it spreads itself by means of 'hosts'. 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 carrying it on a removable medium. Additionally, 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 worms. A worm, however, can spread itself to other computers without needing to be transferred as part of a host. Many personal computers are now connected to the Internet and to local-area networks, facilitating their spread. Today's viruses may also take advantage of network services such as the World Wide Web, e-mail, and file sharing systems to spread, blurring the line between viruses and worms.\n\nViruses can infect different types of hosts. The most common targets are executable files that contain application software or parts of the operating system. Viruses have also infected the executable boot sectors of floppy disks, script files of application programs, and documents that can contain macro scripts. Additionally, viruses can infect files in other ways than simply inserting a copy of their code into the code of the host program. For example, a virus can overwrite its host with the virus code, or it can use a trick to ensure that the virus program is executed when the user wants to execute the (unmodified) host program. Viruses have existed for many different operating systems, including MS-DOS, AmigaOS, Mac OS and even Linux; however, the vast majority of viruses affect Microsoft Windows.\n\nA legitimate application program that can copy itself as a side-effect of its normal function (e.g. backup software) is not considered a virus. Some programs that w
209692
To avoid re-inventing the wheel myself i'm posting links instead of explaining evthing.\n\nYou can read about portscanning here http://en.wikipedia.org/wiki/Portscanning\n\nYou can read about trojan horse here http://en.wikipedia.org/wiki/Trojan_horse_%28computing%29\n\nI would suggest, don't worry about it and let the firewall do its job. Keep your firewall definitions updated. Block unwanted program access to the internet. And continue the good job of keeping your virus definitions updated. \n\nGood luk