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Computer Viruses
Computer viruses are harmful pieces of software which can reproduce themselves and automatically spread to other computers and networks. Questions about computer virus techniques and specific computer viruses belong here.
5,673 Questions
What are the types of LAN technologies?
Answer by Techsupport
There are different types of Media Access Control methods in a LAN, the prominent ones are mentioned below :
=> Ethernet - Ethernet is a 10Mbps LAN that uses the Carrier Sense Multiple Access with Collision Detection (CSMA/CD) protocol to control access network. When an endstation (network device) transmits data, every endstation on the LAN receives it. Each endstation checks the data packet to see whether the destination address matches its own address. If the addresses match, the endstation accepts and processes the packet. If they do not match, it disregards the packet. If two endstations transmit data simultaneously, a collision occurs and the result is a composite, garbled message. All endstations on the network, including the transmitting endstations, detect the collision and ignore the message. Each endstation that wants to transmit waits a random amount of time and then attempts to transmit again. This method is usually used for traditional Ethernet LAN.
=> Token Ring - This is a 4-Mbps or 16-Mbps token-passing method, operating in a ring topology. Devices on a Token Ring network get access to the media through token passing. Token and data pass to each station on the ring. The devices pass the token around the ring until one of the computer who wants to transmit data , takes the token and replaces it with a frame. Each device passes the frame to the next device, until the frame reaches its destination. As the frame passes to the intended recipient, the recipient sets certain bits in the frame to indicate that it received the frame. The original sender of the frame strips the frame data off the ring and issues a new token.
=> Fast Ethernet - This is an extension of 10Mbps Ethernet standard and supports speed upto 100Mbps. The access method used is CSMA/CD .For physical connections Star wiring topology is used. Fast Ethernet is becoming very popular as an upgradation from 10Mbps Ethernet LAN to Fast Ethernet LAN is quite easy.
=> FDDI (Fiber Distributed Data Interface) - FDDI provides data speed at 100Mbps which is faster than Token Ring and Ethernet LANs . FDDI comprise two independent, counter-rotating rings : a primary ring and a secondary ring. Data flows in opposite directions on the rings. The counter-rotating ring architecture prevents data loss in the event of a link failure, a node failure, or the failure of both the primary and secondary links between any two nodes. This technology is usually implemented for a backbone network.
Which websites have really bad computer viruses on them?
Sites that don't have the certificates are more prone to spreading viruses. If the content of the website is objectionable, then you might get objectionable results by interacting with such a site. You can always set your browser settings to be warned of no certificate sites, or for them to be blocked. and if you do end up interacting with such a website, then try not to download anything, and have a good anti-virus working. "Free downloads", "free pornography", spam oriented, are a few examples of sites that are more prone to leaving a virus on your computer.
Spyware infections can easily be removed with the help of anti spyware software that is available on the internet for download.Some anti spyware applications have proven to be more effective than others and so one should read reviews before making a decision.
When using anti spyware software you should also ensure that it is updated frequently with the latest signature updates as this will ensure that it is able to detect and remove any new spyware infections that pose a threat to your system.
What Is Spyware?Spyware is a type of malware which is installed sneakily and maliciously onto a personal computer and collects lots of information at a time about users without their permission. The presence of spyware is typically hidden from the user, and can be difficult to detect. One of the ways that spyware enters the computer is when new programs are installed on your computer. Spyware will try everything to collect not only various types of personal information, such as Internet surfing habits and sites that have been visited but also interfere with user control of the computer in other ways, such as installing additional software and redirecting Web browser activity. It is a high risk for you having spyware hidden on your computer. Spyware also will infect your computer as software virus. Anyway, no matter how spyware enter your computer, they may track your Internet activity or may steal usernames and passwords, credit card numbers, and other personal financial information. How to Remove Spyware?To remove spyware, you should identify the certain program where spyware hidden in at first and then delete it right away. Some spyware would modify the Windows registry maliciously and your computer is still getting bad performance even though you remove spyware. In order to remove spyware completely you had better repair the destroyed registry. From the professional viewpoint, it is really hard to remove spyware and repair the referring files, registry entries manually if you are not an anti-spyware expert. You will definitely have no idea when you face the registry list. You need to download some kind of spyware removal tools which can assist you remove spyware and repair the corrupted registry keys safely and quickly.How do you unfreeze your computer without shutting it down?
Turn it off. Then back on.
power button off/on.
Why is your computer slow to start up?
Do a Defrag. Go to START, PROGRAMS, ASSESSORIES, SYSTEM TOOLS, then do a system cleanup, then defrag.
Clean up any unused programs on your PC. Go to Control Panel, ADD/Remove Programs and remove anything (kid games, etc) you know you don't use for sure. If you're not sure, don't do it.
Kim Komando has some good info at her site www.komando.com and there is a good software package (not expensive) that I bought at Costco called SYSTEM MECHANIC that will do system diagnostics. They probably even have a download for sale on the net. Or at Amazon.
Another thought is just to go to Google and type in your laptop brand and "slow boot up" or "slow start up". I have found lots of nerd discussion boards with useful info this way. Good ideas from others who have had similar challenges on a multitude of problems. MSN has discussion boards on computer problems, for example. As does Microsoft. Click on Tools, Windows Update, and do your updates, then surf around the site for troubleshooting info. If all else fails, go to Data Doctors or another Computer Geek fix it shop and they will usually take care of it.
Answer1. Run a security scan for your laptop. Don't be lazy and think you can deal with the infection files later. If you frequently visit various website and download files often, your laptop will have high risk to be infected. It is really necessary for you to have an anti-virus software to protect the laptop computer. This is the most important step to speed up laptop.
2. Remove hidden junk files on your laptop to speed up your laptop. How long haven't you clean up the junk files? Too many junk files on the system will slow down the laptop speed by occupying the system resource. To delete those hidden junk files, please: Open "My Computer"--"Program files" and then choose the programs you never use or want deleted then just delete the folder.
3. To speed up your laptop computer, you also can disable some unneeded services and programs on the laptop startup. To do this please: Click Start--Run--type in msconfig--under the services tab you can disable the unwanted services. In addition, under the "Startup" tab, you can choose and disable some of them in order to speed up laptop boost speed.
4. Scan and fix Windows registry on your slow speed laptop. Perhaps you will ask that why you can speed up your laptop by cleaning registry errors. Registry stores all of the configuration settings in the system like a brain to human. Any incorrect registry settings, corrupted registry will make your laptop run unstable. If you leave the corrupted or malicious registry entries there and continue to run the damaged system, this potential risk will not only slow your computer down but also crash your system. If you never repair registry errors on your laptop, you can try this method to speed up your laptop.
How do you make a batch to delete files in a certain folder?
Make a new text file and rename it to _____.bat (fill in the blank with a name of your choice). I'm assuming you know how to change file name extensions.
Right click on the .bat file. Choose 'edit'.
type this:
del " __A___ \*._B_"
fill in blank A with the directory name
fill in blank B with the extension of the file type you want to delete or '*' for all files.
EXAMPLE
del "C:\New Folder\*.*" - this will delete everything in the folder
OR
del "C:\Another Folder\*.jpg" - this will only delete files with the jpg extension
Now you can save the batch file and run it.
How do you find viruses from a computer program?
A computer virus is a small program that infects a computer without the user permission. It attaches itself to other files and quickly multiplies. It is strongly recommended that you use an antivirus program on your computer and that you keep it updated. This will prevent any infection and clean your computer if it was infected previous to the install. You are infected with a virus if: * Your computer is very slow, stops responding, restarts or shuts down by itself from time to time. * Your hard disk or the removable drives (floppy drive, CD-ROM, USB Flash) are inaccesibles or the files are corrupt. * Unusual error messages appear. In case your computer got infected, try the following: * Get an antivirus program (if you don't have one already) * Update your antivirus * Scan all your computer and delete, repair or quarantine the infected files. To keep your computer virus free: * Have an antivirus program and update it from time to time (some even update automatically) * Use a firewall. * Only download files from sources you trust. * Don't open e-mail attachments, unless you know who sent it. * For more protection you can scan your computer with online scanners provided free by some of the best companies. * Run Malwarebytes Anti-Malware * Run the anti spyware removal programs spybot and Superantispyware * Run a complete scan with free curing utility Dr.Web CureIt! * Install threat fire which will enhance your anti virus protection and protect you against unknown Trojans and spyware * Then do an Online virus scan
you can't you just have 2 wait until it goes
away 1 sorry ):
How can you bring back a task bar that disappeared off the screen for windows xp?
Some people have found that when they open Task Manager, the tabs and taskbar have suddenly disappeared. This behavior can occur if Task Manager is running in "tiny footprint" mode. If you accidentally double-click the empty space in the border around the tabs, Task Manager switches to this mode. To switch Task Manager back to its normal display mode, just double-click the top border of the window.
If computer is restart again and again?
First, you need to boot into Safe Mode.
In Vista, click Start, right-click Computer, select Properties, then,
In the Systems Window, click Advanced System settings, respond to the UAC.
(For Windows XP, in the System Properties window, click the Advanced tab)
In the System Properties box, in the Startup and Recovery section, click Settings.
In the Startup and Recovery box, uncheck Automatically restart and click OK twice.
Does mangafox give your computer a virus?
There have been reports of malware and potentially harmful ads on manga reading sites like Mangafox. It is always recommended to use caution and have an ad blocker and antivirus software installed when visiting such sites to minimize the risk of encountering viruses.
What are three main safety features of an F1 car?
Formula One racing is considered one of the most dangerous sports for drivers because of the high speeds and challenging courses. Many of the rules in Formula One racing are designed with driver safety in mind and constructors are always looking at new design features to enhance driver safety. Formula One racing rules require that a driver must be able to get out of the racecar quickly. The exit must be accomplished in less than five seconds with the removal of nothing more than the steering wheel. According to FIA rules the steering wheel must also be able to be re-installed within five seconds to allow for quick removal of a car from the track to insure the safety of other Formula One racing drivers. The cockpit area of a Formula One racing car is referred to as the survival cell. In Formula One racing, the survival cell is equipped with a rollover protection hoop as well as front and rear crash protection features. Recent changes have focused on making side walls taller and stronger to protect the driver's head from flying debris. Formula One racing cars are put through crash tests to determine their ability to safely protect the driver. Although fires are rare in Formula One racing today, fire safety precautions are still an important part of driver safety. The clothing worn by race drivers are made from fireproof materials designed to protect the driver in case of fire until it can be extinguished. Design of the clothing must also take into account the extreme conditions that Formula One racing drivers face during a race. During a race drivers must endure extremely high temperatures inside the care and must wear items that allow sweat to escape to avoid overheating. Specially designed fabric that meets both the fireproof and wear-ability factors is used for everything, including the thread and sponsor patches on the uniform as well as the underwear worn by the driver. The shoulders on overalls worn by Formula One racing drivers have to large safety handles. Because FIA rules require that a driver be removed quickly from his car while strapped into the seat they are held in place with only two standardized bolts that can be removed with a tool carried by every rescue team. The long and strong straps make it possible to remove both driver and seat together. Helmets play a key role in Formula One racing safety. It is important that helmets be as lightweight as possible since added weight increases the severity of whiplash during a crash. Today's Formula One racing helmets weigh just under three pounds. The helmet is comprised of layers made of carbon fiber, a plastic like that used in bulletproof vests, a softer plastic and a covering of flameproof material. Visors are composed of a polycarbonate. The leading causes of death in auto racing accidents are skull and neck fractures resulting from rapid deceleration during accidents. The Head and Neck Support system (HANS) was designed to reduce these whiplash effects. The system consists of a collar that is attached to the safety belt and strapped to the helmet to hold the helmet in place during an accident. HANS usage became mandatory in Formula One racing in 2003. Injuries and accidents are unavoidable. Formula One racing sets high standards for medical care at each Grand Prix. Trained medical and extraction teams are in place at each race, each circuit has a fully equipped medical center and local hospitals are on standby during races. * http://www.carsaddiction.info/formula-one/security-first-drivers-safety-in-f-1.html
Seat belts. Air bags. Sexy person ;)
Who is the greatest female tennis player of all time?
- Without question, the greatest female tennis player of all time was Margaret Court: With 62/63 Grand Slam titles to her name, she stands head and shoulders over the rest, and is one of the very few female players to win a true [full Calendar Year] Grand Slam. She is the best singles player, the best doubles player and the best mixed doubles player - the complete 'product'.
To boot, during this incredible career, she retired twice for family reasons and returned to again take up the leadership mantle.
- Steffi Graf and, in second place, Martina Navratilova.
A Sweeper is a soccer player who plays in the midfield and who's job it is to get the ball and play it up to players in attack positions ie they "clean up" the ball from defense and turn it into an attack
How many games do you have to win by to win a set in tennis?
Winning a set in tennis requires 6 games, 7 games, or 6 games and 1 7 point tiebreak worth of won points. Each game requires you to win 4 points (not counting ad scoring) so a 6 game set would require 24 points won. A 7 game set would require 28 points won. A 6 games and 7 point tiebreak set would require 31 points won. All of this is calculated assuming that there is no ad scoring. In theory, with ad scoring sets could take thousands of points to win.
Who is the top black female tennis player?
A list of female African American tennis players that are ranked will most likely include the Williams Sisters, Venus and Serena. Throughout history, other ranked female tennis players that are African American have included Althea Gibson, Ora Washington and Zina Garrison.
How do you use my recycling bin on computer?
Drag a file over the recycling bin icon then release or click on the file and press the delete key (top right of keyboard). To empty the bin and destroy the files you've sent to the bin right click on the bin and left click 'Empty Recycle Bin'.
A pommel horse is an apparatus used in the sport of Gymnastics.
Yes, using unofficial streaming sites like Movie Box can expose your device to malware and viruses. These sites often lack proper security measures, increasing the risk of downloading harmful software. It's essential to use legitimate platforms and ensure your device has up-to-date antivirus protection to avoid potential threats.
Where does the virus multiply?
Viruses replicate inside the host cells they infect. They hijack the cellular machinery of the host to make copies of themselves, leading to the multiplication of the virus.
What term refers to a database of virus signatures and other data to help identify malware?
An antivirus database? I have heard them called definitions instead of signatures, and they are loaded into an antivirus program in order to scan your computer.
Viruses are dangerous because they can invade and replicate within host cells, disrupting normal cellular functions and leading to disease. They can spread rapidly between individuals, causing outbreaks and epidemics, as seen with diseases like influenza and COVID-19. Additionally, some viruses can evade the immune system, making infections difficult to control and treat. Their ability to mutate can also lead to new variants that may be more transmissible or virulent.
Are all website secure and safe?
No, some websites contain hidden malware, keyloggers, trojans, and other viruses that are downloaded onto your computer simply by visiting the website or clicking on a link.
Always keep your security up to date, and avoid clicking on links or opening unknown websites too freely.
