why do people create cpu viruses?
83546
Because they are sick, twisted freaks with no social life save that revolving around their computer screen, and can find no satisfaction in their existance unless it is derived from the suffering and frustration of others. Gotta love em, huh?
913
As the other responders suggest, people don't practice safe computing.  Anti-virus, anti-spyware, firewall...all good and necessary.\n\nStill, most of us think that if we have the software (or hardware) protecting us, then we must be completely safe and we can go happily on our merry way.  I assure you, this is a false sense of security.  Do not trust the hardware or software to do the whole job for you.\n\nI believe the primary reason why computers get a virus is a lack of common sense.  To wit...\n- Be skeptical of anything you receive in e-mail that was not solicited, especially if it has an attachment.\n- Think twice before downloading that freeware.\n- Avoid Kazaa and the like.\n- Do review website certificates to satisfy yourself that the site you're heading for is really the site you wanted to go to.\n- Make sure you download and install every security patch your OS vendor provides.  You should manually review your vendor at least weekly...even if you have an automatic update feature.\n\nA few minutes spent on satisfying yourself that you've done everything you can do will provide you with peace of mind.
58164
We're getting closer to this kind of solution.  Host-based Intrusion Prevention Systems (HIPS) are able to identify virus-like behavior and prevent it.  This includes things like deleting files, writing files to certain folders, copying files, performing certain actions in memory, etc.  HIPS can also block certain types of network traffic.  This is an emerging technology; and it's far from perfect.  But it's a move in the right direction.  Some day our computers will recognize attack behavior and kill the malware causing it.
497453
You may have a memory problem (lack of it) or you may be badly infected with a computer virus.
200969
I DON'T KNOW, BUT HERE'S AN INTERESTING TIMELINE ABOUT VIRUSES\n\nhttp://www.exn.ca/nerds/20000504-55.cfm
842007
seriously why do you want the key for virus bursters? its a virus that wants you to pay money to "remove" spyware that doesnt exist by keeping virus bursters you are pretty much putting a bullentin online saying "hey hackers come get my personal info out of my computer because its unprotected" well good look with virus bursters dumb @$$ ;)
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 !
1016162
Where are you seeing this?  In task manager?  IT is probably a backdoor program or spy ware using up processing time within the memory.
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.
948120
Hi there,\n\nMost antivirus programs use something called "signatures" to protect their users.  These are files which their research team create in order to protect your computer from each infection by basically "patching" a hole in your system.  These are what are downloaded when you perform an "update".\n\nHowever, this is a very outdated technique and is being abandoned by forward thinking security programs.  One such program which I use and recommend is Prevx1.  This program requires ZERO updates, yet your protection capabilities are being updated every second of every day. Outdated programs which require you to download signatures means you could be unprotected for days or weeks why a member of their research team creates a fix for you to download.  Prevx1 works in a completely unique way, meaning if any person with Prevx1 installed on their computer discovers a new infection, it is automatically blocked from running. The best part however, is that Prevx then informs their online malware database which instantly protects every other user in the world with Prevx1 installed.\n\nVery Clever.
1111624
it gets viruses from the computer
609652
each virus is different, so you'd need to know which one it was...or know in-depth how your os works (and that is a book, not a post at yahoo answers)
3145
The viruses are Not evolving.  The programmers who write them are becoming more clever or perhaps have learned a few more tricks.\nThis includes viruses, trojan horses and sleeper programs, some of which modify their own code to make it harder to spot them, especially if they do not attempt to do anything immediately.\nSome the worst viruses are now being written by the DOD to send into enemy country banking systems.  These are the ones you hope never get used.
1013717
yes. b cuz people can hack in 2 it while its on & give u a virus
1019511
There are perfectly legitimate reasons for doing that. However the knowledge could be used for evil purposes too. You should heve given more information so we wouldn't think you wanted to do something evil. Since criminal masterminds don't post question to places like yahoo answers for the whole world to see  i assume your intentions are good, and your question is just badly worded and undetailed.\n\nThere are many remote administration tools(that is the nice name for a trojan) available which can do just that. The tools will most likely require that you have access to the pc to install a component(server side software) which your client side software can connect/send commands to.\n\nIf there are many computers on the network which use images for relaoding of the harddrive it would be best to install and setup the component on the image.\n\nIf you are going to use a trojan (ie the evil equivalent of remote administration) it is best that you write your own since most Anti-virus software will stop widely known off the shelf trojans, days after they are released unless the trojan can disable or block the antivirus. If you write your own and limit the number of infections your trojan will last longer.\n\nYour question makes it sound like you want to do something very illegal, something which you can goto jail for. If you get caught and convicted of installing something malicious on someones computer without thier knowledge it is very likely you will go to jail where people will upload things into your anus without your permission. Script kiddies have the same level of respect in prison as peadophiles, which is none at all.\n\nIf you want to uplaod the files illegally without using the machine then you should write tools to test for vulnerablities in their operating systems or like script kiddies download them. After you know the vulnerablities you could upload the files through these vulnerablities depending of course on the vulnerablity.\n\nMost people are pretty stupid so pack your evil file into an execuatable and mail it to them. when they execute the file your evil file should be unpacked and commanded to run by the main executable. Just make sure the main executable is useful like a mario game or something. Alternativly pack the stuff into a excel  document( I am not sure how but there is a newly discoverd flaw in Excel which may allow you to do some evil stuff. since it's new  it will be about 3 weeks before microsoft releases a patch for it, and the patch will only work for legal version of office).\n\nI have never done any of this stuff. My answer is most likely not 100% correct since i am no expert. Best you ask at network admin forum or jhacker forum depending on your intentions.
235882
The answers are endless for this.  \n\nYou will need to provide more details to pinpoint the problem.\n\nCould be excessive downloads of large files.\n\nCould be somebody hacking in.\n\nCould be Viri or Worms\n\nCould be insufficient or outdated equipment\n\nCould be your imagination.\n\nGet the idea?
714060
Hacking is obvious, but also make sure someone is not surfing on the server. This is opening the chances of viruses. Constantly updating definition device on the AntiVirus program.