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Are you having problems playing sounds on your computer? There's no need to worry. That can be easily resolved by going through a little troubleshooting. Follow the steps below:
Are your speakers on? If you are using speakers, make sure that the power cord is firmly plugged into a working outlet and that the speakers are turned on.
Are your speakers or headphones properly connected? The sound cable of the speakers or headphones must be securely plugged into the appropriate jack on the computer. Look up your speaker/headphone documentation to be sure that you have connected them correctly.
Are the volume settings correctly set? Adjust the volume control to the proper settings on the speakers or headphones and on the computer itself. Make sure that audio is not muted.
Is the source media playable? You may be trying to play a damaged disk or a corrupt sound file. Try a different disk or sound file.
Are your speakers or headphones working properly? Try different headphones or speakers. The ones you are trying to use may be defective.
Is your sound device working properly? Your sound device should be enabled and properly configured. If you have more than one sound device, the device you are trying to use should be the default sound device. The documentation that came with your sound device will provide information on how to enable and configure it.
If your sound device has been properly enabled and configured and seems to be working properly, yet you still can not hear sounds, or if you can not configure your sound device on your system, it is most likely due to not having the correct device drivers.
Device drivers are programs which add functionality to devices. These are software that make hardware devices work. As with all other programs or software, device drivers need to be compatible with the platform or operating system on which they are to be used. A device driver designed for a MAC will most definitely not run on a PC. And drivers made for Windows 98 will not work on Windows Vista. For drivers to make any device function properly, the correct version for the particular system must be installed.
When you buy a computer, the correct drivers are usually already installed on it and a driver installer disk or a recovery disk usually comes with it. There are circumstances wherein the drivers are lost, most of the time because of a system crash. Reinstalling the drivers from the disk that came with the computer would solve this. But what if the disk has been damaged or lost and the computer is already beyond warranty? Or what if the system was upgraded so that the device drivers that came with it no longer work with the upgraded system?
Again, there's no need to worry. That can be easily resolved by using a driver finder program. A good driver finder program will scan your computer, identify hardware devices installed on it, recommend drivers specifically made for the brand of your computer, and download the most up to date drivers for your devices. It should preferably have a feature that will allow you to copy the downloaded drivers to a CD, network drive or USB flash drive. An option that lets you download the program and scan your computer for free would be an added bonus.
There are many driver finder programs on the market. You can search the internet and choose one which will work best for you.
Fara is a consultant engaged in rating the quality of web search results to improve internet user experience. She also specializes in web development, remote business administration solutions, PC technical support and internet security, and is one of the major solutions providers for Clarafaie Solutions. For the past year, she has been working with Affilorama Group Ltd and Doubledot Media Ltd, helping aspiring internet marketers achieve success in their online business ventures. In her spare time, she writes for a few selected clients.
Computer networking was invented to make the computers communicate with each other. Communication between computers is faster and easier than any other mode of communication. In addition to providing faster communication, computer networking empowered the computer users to to access remote programs and databases. Apart from these plus points, there are several other benefits of computer networks. Computer networking reduces the business process expenditure by making hardware and software resources remotely accessible and by downsizing to microcomputer-based networks instead of using mainframes. Accumulating data from multiple resources has become effortless process, which also ensures the reliability of the information.
Definition Of Computer Network
A computer network is defined as an interconnected system in which computers are interlinked to each other for communication purpose so that resources and information could be accessed by all connected nodes.
Menace to Computer Networks
Computer hacking poses a very grave danger to computer networks. This threat is defined by infringement on the secure private information or illegal modification of files, web pages or software stored on computer. Computers are hacked because important and critical data are stored on these machines. One common perception is that all computer hackers are outsiders, who must be prevented from accessing the protected computer networks illegally. But that is not completely true. An evil insider with sinister intention could as dangerous as an outsider is! The most common form of computer hacking are:-
1. Illegal entry into any protected computer system.
2. Unlawful modification, deletion and access denial to data stored on a computer system.
3. Illegitimate searching and browsing.
4. Unauthorized attempts to breach computer security system.
The objective of illegal entry is access some secret and important data. There could be different forms of such attacks, such as unlawful execution of commands, breaching confidentiality, data deletion and data diddling.
Generally unknown and untrustworthy persons are not allowed to execute commands on a protected machine. When such an act takes place, network security is breached. Such problem could happen either through normal user access or administrator access. A normal user is allowed to perform certain operations on a computer like reading and writing files, sending e mails, etc. A hacker requires that access to perform all those operations. Certain operations could be performed only by system administrators, such as changing configuration settings. Without gaining administrator privilege, a hacker cannot perform this system operation.
There are two types of destructive attacks,namely data diddling and data deletion. Data is manipulated in the data diddling process without the knowledge of the user. The effects of data diddling becomes visible to the user after a log period. I the data deletion process, the critical data is destroyed for ever.
How To Stop Hacking
There are a number of ways to deter hacking.
1. Acceptable user policies should be clearly established and disseminated to the concerned users.
2. Sufficient backups should be taken periodically. Data backup services are rendered by PC Support providers.
3. The use of filters should be considered to deny access to unauthorized elements. Effective firewalls could be installed with the help of network support providers.
4. The operating system installed on the computer must be updated as and when required. Many PC support providers render support for various operating systems.
5. The security system with single point of failure should be avoided. Any security system that could be easily breached by breaking through any one component is not a good one.
6. It is advisable to take the help of PC Support provider when security is breached. New methods of hacking always keep coming up. It is difficult for a common user to keep abreast of latest means of hacking. Since Network Support providers always keep themselves updated on all the latest developments on hacking, it is prudent to use their services.
Daniel Hughes is one of most heralded content writer of http://www.pccarencure.com. Pccarencure offers 24x7 PC Support to millions of customers by expert technicians.
Computers that are connected to a network can be exposed to different problems than most stand alone systems. The network security problems these machines face can include risks posed by outside sources infiltrating the main network. These can come in the form of spy tactics, attacks on entire networks and users trying to exploit the system. When computers are connected to a main system all of the machines are vulnerable to these risks.
A user trying to exploit a system will transmit small bits of information over the shared connection. Once the entire package has been sent, the bits of data reassemble themselves to become an undetected program running in the background. This can cause systems to slow down or create interference for running certain programs. Some of these data programs are designed to kick in when a specific application is opened or installed.
Spying can also be referred to as eavesdropping and is something that occurs within network communications. In this procedure, the hacker or unauthorized party, simply taps into the system to copy data as it is transmitted. This process can work even when a system sends encrypted data, because there are tools designed to get through the encryption to expose the original data.
Another type of system attack is sometimes referred to as DoS. These initials stand for denial of service, which operates differently than the eavesdropping type pf attack. This procedure is designed to halt the operation of a network by blocking out its connections. This can occur when the system is hit with an enormous amount of traffic in a very short period of time. This attack usually focuses on Internet websites and servers. Once the system is down no one can connect to it.
Computer users might have heard of programs using backdoor operations. This is a process used to gain entry into a system without the authority or approval of the user. Programs designed to gain access to a computer in this manner often disguise themselves as other software programs the user will accept. This procedure works well on systems with no or very little security.
Most network security problems arise due to the way a particular system is designed. If the problems are anticipated in advance a system can be set up to detect and remove threats before they create problems. An existing system can often be redesigned to reduce or eliminate most of the risks involved in network systems.
Paul J James is a freelance writer who enjoys writing about all things technical. This includes Network Monitoring Tools that provide Application Performance Monitoring for large corporations.
Networked computers are vulnerable to different threats arising from network security problems associated with the network infrastructure deployed for the system. Common problems may be classified as exploits, eavesdropping, backdoors, and network attacks. All these problems may compromise just a part of the network and severe attacks have the potential of compromising the entire network.
Exploits are small pieces of information transmitted through the system that connects several computers. This piece of information reassembles itself upon arriving on the host computer and becomes a small piece of software or just a sequence of commands that will take advantage of the glitches or bugs present in the computer operating system or in one of its installed software applications. The same piece of information can also retain its original file type and is activated once the required software application opens the malicious file. By exploiting the flaw in software applications, security is compromised and unauthorized remote access is inadvertently granted to hackers.
Another common problem is eavesdropping between hosts communicating on the same network. Eavesdropping tools can be used to tap the line connecting the two communicating hosts and relayed information is copied during the transmission process. Although transmissions are encrypted, built-in decryption tools are available to recover the actual information being sent.
Denial-of-service attacks (DoS), on the other hand, do not compromise the information transmitted within the system. Instead, this type of attack is intended to render a computer resource unavailable by intentionally saturating its traffic. This problem is commonly targeted towards Internet sites and services that rely on network connections to work. The basic idea behind this kind of attack involves pouring in a sufficient number of requests more than the server can handle at one time. This results to traffic congestion eventually denying legitimate access to the site from passing through.
Finally, there are backdoors that enable remote access to a computer. This vulnerability is often undetected especially if the compromised computer does not have enough security features installed in the system. Backdoors may be installed on the host computer. In more common cases, backdoors enter the system through modified programs or hardware device that may otherwise appear legitimate.
Network security problems have their roots on the systems design adapted for a particular network. By anticipating security issues that may arise and securing the network beforehand, these problems are reduced if not totally eliminated. If it is too expensive to redesign a defective computer system, then third-party security installations must be integrated into the system.
Paul De Vizard is a freelance writer who enjoys writing about all things technical. This includes Network Monitoring Tools that provide Application Performance Monitoring for large corporations.
