How to protect your Computer. Wery useful Tips

Today, many people rely on computers to do homework, work, and create or store useful information. Therefore, it is important for the information on the computer to be stored and kept properly. It is also extremely important for people on computers to protect their computer from data loss, misuse, and abuse. For example, it is crucial for businesses to keep information they have secure so that hackers can’t access the information. Home users also need to take means to make sure that their credit card numbers are secure when they are participating in online transactions. A computer security risk is any action that could cause lost of information, software, data, processing incompatibilities, or cause damage to computer hardware, a lot of these are planned to do damage. An intentional breach in computer security is known as a computer crime which is slightly different from a cypercrime. A cybercrime is known as illegal acts based on the internet and is one of the FBI’s top priorities. There are several distinct categories for people that cause cybercrimes, and they are refereed as hacker, cracker, cyberterrorist, cyberextortionist, unethical employee, script kiddie and corporate spy. The term hacker was actually known as a good word but now it has a very negative view. A hacker is defined as someone who accesses a computer or computer network unlawfully. They often claim that they do this to find leaks in the security of a network. The term cracker has never been associated with something positive this refers to someone how intentionally access a computer or computer network for evil reasons. It’s basically an evil hacker. They access it with the intent of destroying, or stealing information. Both crackers and hackers are very advanced with network skills. A cyberterrorist is someone who uses a computer network or the internet to destroy computers for political reasons. It’s just like a regular terrorist attack because it requires highly skilled individuals, millions of dollars to implement, and years of planning. The term cyperextortionist is someone who uses emails as an offensive force. They would usually send a company a very threatening email stating that they will release some confidential information, exploit a security leak, or launch an attack that will harm a company’s network. They will request a paid amount to not proceed sort of like black mailing in a since. An unethical employee is an employee that illegally accesses their company’s network for numerous reasons. One could be the money they can get from selling top secret information, or some may be bitter and want revenge. A script kiddie is someone who is like a cracker because they may have the intentions of doing harm, but they usually lack the technical skills. They are usually silly teenagers that use prewritten hacking and cracking programs. A corporate spy has extremely high computer and network skills and is hired to break into a specific computer or computer network to steal or delete data and information. Shady companies hire these type people in a practice known as corporate espionage. They do this to gain an advantage over their competition an illegal practice. Business and home users must do their best to protect or safeguard their computers from security risks. The next part of this article will give some pointers to help protect your computer. However, one must remember that there is no one hundred percent guarantee way to protect your computer so becoming more knowledgeable about them is a must during these days. When you transfer information over a network it has a high security risk compared to information transmitted in a business network because the administrators usually take some extreme measures to help protect against security risks. Over the internet there is no powerful administrator which makes the risk a lot higher. If your not sure if your computer is vulnerable to a computer risk than you can always use some-type of online security service which is a website that checks your computer for email and Internet vulnerabilities. The company will then give some pointers on how to correct these vulnerabilities. The Computer Emergency Response Team Coordination Center is a place that can do this. The typical network attacks that puts computers at risk includes viruses, worms, spoofing, Trojan horses, and denial of service attacks. Every unprotected computer is vulnerable to a computer virus which is a potentially harming computer program that infects a computer negatively and altering the way the computer operates without the user’s consent. Once the virus is in the computer it can spread throughout infecting other files and potentially damaging the operating system itself. It’s similar to a bacteria virus that infects humans because it gets into the body through small openings and can spread to other parts of the body and can cause some damage. The similarity is, the best way to avoid is preparation. A computer worm is a program that repeatedly copies itself and is very similar to a computer virus. However the difference is that a virus needs o attach itself to an executable file and become a part of it. A computer worm doesn’t need to do that I seems copies to itself and to other networks and eats up a lot of bandwidth. A Trojan Horse named after the famous Greek myth and is used to describe a program that secretly hides and actually looks like a legitimate program but is a fake. A certain action usually triggers the Trojan horse, and unlike viruses and worms they don’t replicate itself. Computer viruses, worms, and Trojan horses are all classifies as malicious-logic programs which are just programs that deliberately harms a computer. Although these are the common three there are many more variations and it would be almost impossible to list them. You know when a computer is infected by a virus, worm, or Trojan horse if one or more of these acts happen: ? Screen shots of weird messages or pictures appear. ? You have less available memory then you expected ? Music or sounds plays randomly. ? Files get corrupted ? Programs are files don’t work properly ? Unknown files or programs randomly appear ? System properties fluctuate Computer viruses, worms, and Trojan horses deliver their payload or instructions through four common ways. One, when an individual runs an infected program so if you download a lot of things you should always scan the files before executing, especially executable files. Second, is when an individual runs an infected program. Third, is when an individual bots a computer with an infected drive, so that’s why it’s important to not leave media files in your computer when you shut it down. Fourth is when it connects an unprotected computer to a network. Today, a very common way that people get a computer virus, worm, or Trojan horse is when they open up an infected file through an email attachment. There are literally thousands of computer malicious logic programs and new one comes out by the numbers so that’s why it’s important to keep up to date with new ones that come out each day. Many websites keep track of this. There is no known method for completely protecting a computer or computer network from computer viruses, worms, and Trojan horses, but people can take several precautions to significantly reduce their chances of being infected by one of those malicious programs. Whenever you start a computer you should have no removable media in he drives. This goes for CD, DVD, and floppy disks. When the computer starts up it tries to execute a bot sector on the drives and even if it’s unsuccessful any given various on the bot sector can infect the computer’s hard disk. If you must start the computer for a particular reason, such as the hard disk fails and you are trying to reformat the drive make sure that the disk is not infected. More about Computers and Internet on : http://bestofcomputers.blogspot.com Find some useful TIPS about investment and financing on: http://investmentandfinancing.blogspot.com

Guide To Computer Security

Since you're reading this article, you're already connected to the Internet. You've probably already thought about security on your computer or network. Every day seems to bring new threats and it can seem pretty daunting, but the key thing is to have a common sense approach and to take a few basic precautions. There are lots of great tools available to help and you don't have to break the bank to get them. Here are some areas to take a look at: BACKUPS Securing your information starts here. You'll need some or all of the security tools listed below, but even then you can't guarantee 100% that you won't have a problem. Hardware failures do occur so backup your data. One easy way to keep your important files is to burn them onto CD or DVD. ANTIVIRUS SOFTWARE An absolute must have. Alright, you already knew that, but I can't stress too strongly the importance of having good, up-to-date antivirus software. With new threats and Viruses arriving every day it's important to maintain update subscriptions and download virus definition updates as soon as they become available. There's a lot of good antivirus software available, both free and for low cost. I'd recommend going for paid software...you just never know when you're going to need to call a helpdesk and that's generally the difference between the free stuff and the stuff you pay for. Norton, McAfee, AVG and others all sell antivirus software that's affordable on a low budget. FIREWALL A firewall is always recommended to help protect against unauthorized access to your PC. For a small number of PCs a software firewall is usually best and is the easiest to work with if you're not an IT expert. However, don't discount hardware firewalls, especially if you have a network with a lot of devices on it. Whatever you do, don't rely on the Network Address Translation or packet filter built in to your ADSL or Cable router. It almost certainly won't be enough. If you're buying a particular company's Antivirus software it's worth considering buying their integrated AV and firewall package if they have one (if they don't then maybe you should try someone else). It may well save you money and be easier to configure and maintain. ANTI-SPYWARE SOFTWARE If you spend a lot of time browsing the Web (and let's face it, who doesn't?), then spyware is going to find its way onto your machine. A lot of it isn't particularly nasty, but the really bad stuff can send important information like passwords, bank details or credit card numbers to people you really don't want to have access to that stuff. At the very least it can slow down your PC and since you didn't ask for it in the first place then you should get rid of it. Some tell-tail signs that you have a Spyware infection are: - You're getting pop-up ads all the time - Your default homepage or other settings in your browser suddenly change (especially if you can't change them back) - Your computer is slow (there could be other reasons for this, but it's worth checking for spyware) There's some good free software available from Lavasoft called AdAware. Microsoft also have their own free tool for Windows users called Windows Defender. Among the paid-for Anti-Spyware software Webroot's Spy Sweeper regularly picks up awards from computer magazines. PASSWORDS More and more people are accessing secure sites for shopping, banking, etc. Provided you take sensible precautions it's a great way to shop. If you've been doing any online shopping you'll be used to dealing with secure sites. Whatever methods these sites use to secure their servers or encrypt your traffic, if they're accessed by passwords then you share some of the responsibility for the security on your transactions. Here are a few tips on how to keep unauthorised users from accessing your accounts: - Be inventive with your passwords. Don't use easy to guess stuff that a lot of people know about you or can find out. Use a mixture of uppercase and lowercase characters, numbers and special characters (again be inventive. Just using a 1 instead of the letter i is no use if it still spells out an easy to guess word). - Use different passwords for different accounts. If you always use the same one and it's compromised then someone will have access to everything. - Don't write passwords down on paper or post-it notes. That's a hacker's favourite way to find passwords if they have physical access to your office. - Don't get Web browsers to remember your passwords on shared machines or in office areas. If you log into a machine that other users have access to then never use Windows or Web browser mechanisms that remember your account details. Having different passwords to lots of different accounts does make it more difficult to remember them and it's important that this doesn't lead you into bad habits. So what do you do? You could look at getting some password management software. Naturally, Norton has a password manager, but other good options include "Web Replay" from Deskperience or "PC Password Manager XP" from CPLab. WHERE TO NOW? You don't have to go out and buy every piece of security software right away. Prioritise one or two to start with (I'd suggest Antivirus and Firewall software). Also download trial versions so you can be sure you're happy with them before you part with your hard earned cash. Be careful on the Internet, but don't let it spoil your day.

The danger behind peer-to-peer file sharing

File sharing is very common nowadays. You can get a P2P (peer-to-peer) program for free, and soon start sharing stuff like music, videos and programs. We use these applications freely and most of us don’t know the risks involved when using them.

Questionable reliability of files – Once we get our hands on a P2P program, we download everything we want like crazy. Favorite music, free softwares, as long as it is available, you download them. Hackers, attackers, or whatever, use this to their advantage. They can insert Trojans, viruses, spyware and other kinds of malware, and then share it to the P2P network. Unwary victims fall prey to these traps, and pay its price.

They make you vulnerable. Don’t let them. – Some P2P programs request you to open up your firewall in order for you to share and download files. This makes you vulnerable and giving attackers openings and opportunities to attack your system.

Breaching privacy – P2P programs that require you to give personal information are very doubtful when it comes to keeping your data secure. Since security is also unreliable, unauthorized people can gain access to your information easily.

Piracy – Would you consider the fact that P2P hosts illegal action which violates the intellectual property rights of hardworking people? The music industry, for example, is going down and most people don’t even care, as long as they get songs for free.

To eliminate P2P risks, take preventive measures and just don’t use them. If you still want to use such applications, be sure to be prepared for the worse.

Keep an anti-virus software in your computer and regularly update its definitions. Everyday, there are new kinds of viruses that spread in the internet, so keeping your anti-virus programs updated is a must.

Enable your firewall. If the P2P program asks you to turn it off or open some ports, don’t do it. Just find some other program that doesn’t require you to do anything irrational to your firewall.

To keep your computer secured and optimized, you can go to here for more stuff regarding security. It also contains tips and tricks for pc, internet, softwares and hardwares that can be of real benefit.

Does Internet security software really work?

In the recent years there has been many Internet securtity tools to hit the consumer market that claim to be providing excellent protection against online threats such as phishing sites, Trojan horses and viruses. Amongst Internet security packages there are Norton Internet Security, Webroot Spy Sweeper, McAfee Antivirus and many more. Are those products really so efficient in fighting threats and safeguarding our personal information from being stolen?

With the introduction of the Norton Internet Security 2007 that comes with a new interface and a lower price the private user may expect they get a comprehensive online protection and personal information safety whilst banking or shopping online.

These Internet security tools, and Norton Internet Security in particular, come with a bunch of smart features that can give you an additional protection against even unknown, or unrecognized threats by using behavior monitoring algorithms. But, many average users who never stray far from mainstream Web sites will find most of features of the internet security software available today unnecessary - it's like purchasing a BMW to drive it only to church on Sundays.

For example McAfee internet security tools still feel heavy and clumsy even if its new version, failing to find the happy medium between features, ease-of-use and performance.

On top of that, many applications do not play well with other security software you might already have installed on your PC. These are third-party anti-virus, antispyware and anti-adware software you purchased from other vendors that apps that may have been serving you well so far and there's no reason why you should stop using them.

Therefore, I recommend to have a look at the features first, before any purchasing decision is made – if you decide you don't need a BMW to drive to church once a week, a lighter, much more user friendly internet security software, such as ZoneAlarm Internet Security 7, may be a better choice.

Today, there are a few types of risks that may affect your PC's security while you surf the Web and install downloaded software: viruses, Trojan horses, spyware, worms and rootkits. Thes programs can install on your computer when you download software from untrusted sources or visit booby-trapped websites often referred as to phishing sites.

On top of that, malware often spreads itself by sending bogus e-mails to everyone in your address book. But not only pirate copies of software can contain dangerous code - viruses often come from unsuspecting sources; even some Sony music CDs inadvertently inflicted viruses.

All antivirus software packages available today is especially to deal with these threats by scanning downloaded files, running applications, scanning incoming e-mails, attachments and some of them can even scan instant messages blocking and deleting incoming malware. Security researchers say antivirus software has become essential, but it's no longer enough because you come across dangerous sites every day you surf the Web that can use smart techniques to launch an attack on your PC.

Some of the malicious software is designed to steal sensitive information such as login credentials, passwords, personal information and even credit card numbers. Hackers keep inventing new ways of stealing information penetrating your computer or hijacking keystrokes you type while you shop or bank online.

While online identity theft has become a growing problem, protecting your computer from these kind of threats is essential. Any chunk of information you keep on your computer or send over the Internet may be to cybercriminals. This is why you need strong Internet security protection – an anti virus, a firewall and an anti-spyware software.

Research show, that most security and privacy threats come from adware, spyware and phishing. Security engineers admit these types of threats are amongst the fastest-growing threats to PC and personal security on the Web today. The major problem is that these applications are tiny programs that can be transported over the Internet and installed on the victim's computer in seconds and can not be detected without a proper anti malware program working in the background.

Some spyware and adware can be moderately not harmful, gathering information about what sites you visit or what you do while you work on the PC, however, there are still very dangerous spyware out there that can be used for example to connect your computer to a world-wide network of infected machines – a botnet – that cybercriminals often use to launch DDoS (Distributed Denial of Service) attacks.

An article called "State of the net 2006," issued in the September 2006 by Consumer Reports cites alarming statistics showing the damage caused by viruses, spywae and advare to computers owned by individuals and businesses. The magazine reports that nearly a million people replaced their computers in the past six months because of spyware infections.


Charles Brooker is IT security advisor and software tester at Norton-Soft – Information Source about Norton Software

Computer Virus And Internet Worms Explained

Is your computer sluggish? It won't open programs and you can't get into anything? Well, maybe you have a sick computer. Just as people get ill from viruses, so do computers. When this happens, you need to have a computer technician look at the computer to re-format and get rid of the virus. If you know something about computers, you might be able to do this yourself.

What is a Virus?

A virus is a parasitic program written to intentionally enter a computer without the user's permission or knowledge. The word parasitic is used because a virus attaches to files or boot sectors and replicates itself, which allows it to spread. Though some viruses do little more than copy themselves, others can cause serious damage or affect program and system performance. A virus should never be assumed harmless or left on a system.

Types of viruses

Viruses are classified by the ways they infect computer systems:

1) Program: Executable program files such as those ending with the extensions .Com, .Exe, .Ovl, .Drv, .Sys, .Bin
2) Boot: Boot Record, Master Boot, FAT and Partition Table.
3) Multipartite: Both program and boot infector.

What is Trojan Horse?

Besides being a large wooden horse used in the Trojan war 2500 years ago (and more recently by Brad Pitt), a Trojan Horse or Trojan is a computer program that seems innocuous or harmless, but conceals another more nasty function. Generally a Trojan is contained in a part of program brought into your computer from an outside source - (e.g. floppy disk, CD, internet download, infected email). Trojans can be dangerous sometimes. For example a program may appear to be a computer game demo, but while you enjoy the game, it may be happily formatting your hard disk or emailing porn sites to everyone in your email address book.

Trojans are also used as a 'back door' or 'trap door' to sneak into a computer's operating system's information. An example is a program that pretends to be the system log-in program (such as you find in Windows NT/XP or Linux). When an unsuspecting user tries to log-in, the Trojan program captures the user-name & password. Then it may indicate a failed log-in attempt and exit to the real log-in program. The user may successfully log into the system next time, but by that time Trojan has also got enough details to log into the system.

Example Trojans

Notroj. This Trojan horse pretends to be a program that guards against Trojans. It's actually a time bomb that wipes out the hard disk after it's more than 70 percent full.

PWSteal.Refest A Trojan Horse that installs itself as a BHO (Browser Helper Object) for Internet Explorer and steals online banking information when it is submitted in web forms.

PWSteal.Likmet.A A Trojan horse that displays a fake MSN Messenger logon window and steals the password provided.

Run.me. This is a graphics program, which plays the Star Spangled Banner and displays the American Flag while it worms its way into the hard disk and erases the data on it.

What is Worm?

A Worm is a self-propagating program that works its way through a system or network (like the Internet), often causing damage. It does not require a host program to activate it. Someone has to insert a worm directly into network of interconnected computers where messages can be sent from one to another and data files and programs exchanged. An example is a local area network where each computer has its own files, programs operating systems and hard discs such as would be found in a university or corporate setting.

Example Worms

Alarm Clock Worm. A worm that reaches out through the network to an outgoing terminal (one equipped with a modem), and places wake-up calls to a list of users.

Worm Watcher. A special program which automatically takes steps to limit the size of a worm, or shut it down, it grows beyond a certain limit. The worm watcher also maintains a running log recording changes in the