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Imagine what would happen if your computer hard disk crashed unexpectedly and you discovered that your personal data had not been backed up for several months.

For most businesses and corporate institutions, the loss of confidential data can be huge financially. It can take weeks or months to re-create lost files such as complex spreadsheets or software source files. In some cases, re-creating the files might not even be a viable option - for example, if the data you’ve lost included files required by your company’s CEO for board meeting scheduled for first thing tomorrow morning.

In such a case, hard disk data recovery could be the ideal to recover your lost data files.

There are a number of hard disk data recovery options available to home and office users. Individuals can use data recovery freeware or software programs to recover data from a partially functional hard drive. On the corporate level, it simply pays to call in a data recovery expert to handle the job. Deciding whether to attempt the job personally or whether to call in a pro is not always easy.

There are certain key factors that can help with the decision making process. Essentially, it’s time to call in a hard disk data recovery specialist for the following reasons:

1. A computer won’t boot at all.
When your PC will not allow you to enter any commands when booting up, the chances are that a professional job is required. While hard disk data recovery programs can and do work, they cannot function if a computer will not boot up the operating system and read them. In this situation, getting in a technical
expert to do the job would be the best option.

2. Recovery programs do not work.
Sometimes a hard disk data recovery program will fail to restore the necessary files. If this happens, the data recovery professionals might still be able to save the day and recover your data.

3. Your lost data files are particularly valuable.
If the files trapped on a computer are impossible to replace, it can simply make sense to bypass personal efforts to restore data and go straight to a professional. While hard disk data recovery programs can be very useful, a professional can often produce better results, or at least deliver more peace of mind in the process.

4. You may not be confident of doing the job yourself.
Sometimes people question their own ability to handle hard disk data recovery, especially if it’s something that they haven’t done before. If you’re not sure what to do, if there is any doubt or concerns in your mind, then do not hesitate in calling in a data recovery specialist.

Although it’s not 100% certain that a hard disk data recovery effort will result in a positive outcome, on most occasions it will. There are many data recovery programs available online which can help recover your data, especially on functional systems.

However, getting data recovery professionals involved at an early stage in the recovery process, especially on failed systems, is usually the safest option as it gives you total peace of mind.

To learn more about data recovery software visit Datarecoveryfreeware.net where there is information and advice on hard drive data recovery.

You hear the word Ajax a lot these days, particularly in technology, so; what are people talking about? A Greek hero from the Odyssey - sure. A bathroom cleanser that gets your sink sparkly - indeed. But today, more often then not, Ajax refers to a specific type of web programming that has taken the internet by storm.

The term Ajax was coined as shorthand for - Asynchronous JavaScript and XML by a man named Jesse James Garrett who founded a technical consultancy called Adaptive Path. He would want me to make it clear that Ajax is not an acronym (so it isn’t spelled AJAX).

What Mr. Garrett described back in 2005 was a stack of technologies (not a single technology) being used at the time by very cutting-edge web sites. This stack of technologies allowed web sites to be turned from a set of static documents connected by hypertext links into something that approximated a true application. This was the intellectual birth (or coming out party anyway) of the Rich Internet Application (RIA).

At the heart of Ajax is a software object built into all browsers called the XMLHttpRequest object. This mouthful is frequently shortened to XHR for those that want to talk about it in fewer syllables. This software object allows JavaScript code, executed in the browser, to go out and request data from a server without reloading a page.

This technology was not new in 2005, but Mr. Garrett put a catchy name to it, and people noticed. Around the same time, a number of web applications such as Gmail emerged and people wondered, “how the heck did they do that?”

Think of a typical web page as one where you have to click a link or submit a form then wait for a new page to be returned to see your result. It’s slow and doesn’t really act the way we expect software to act. Now look at web applications like Flickr, Gmail, or Youtube. You can click in a box and enter some data, and your updates happen without you leaving the page. The magic that’s happening in the background is Ajax (or and XRH call).

With Ajax, the idea is that you get a richer, faster user experience. Properly implemented, a web page can become a rich internet application (RIA). Most extremely popular web sites use Ajax to some degree. Amazon’s rating system, where you click on the number of stars you give a book or CD is one example.

Even though Ajax and XMLHttpRequest both refernce XML, the data that is used does not necessarily have to be formatted as XML. In fact, more and more other data formats, such as JavaScript Object Notation (JSON), are being used. One restriction on XHR is called the single origin policy. This is a security policy, enforced by the browsers, that only allows JavaScript to request data from the server that originally served up a page. There is a technique using JSON that get around this restriction.

Since 2005 a number of toolkits have emerged that have allowed web developers to more easily implement Ajax in their applications. Some of these are Dojo, Prototype, jQuery, GWT, YUI… and many many others.

As a technology stack, Ajax is now quite mature and being used almost everywhere on the web. Ultimately, the most important thing to remember is to create the best posisble user experience.

John Moore is a Web 2.0 expert who creates Rich Internet Applications. He has created the web’s first RIA community at http://www.riaspot.com

What makes Registry errors show up? Your system registry is one of the most critical and crucial components of your computer, and it is needed for every program on your computer as well as the operating system. Errors in the registry can have a wide variety of effects, from a computer which is slow and sluggish to a complete system failure and loss. Every program on your system has entries in the registry, and so do preferences for users and other settings. The registry may show many error messages because of problems, and these Registry errors should be fixed as soon as possible.

Registry errors can be caused by any number of things, including fragments of removed programs still in the registry, corrupt files, viruses and other harmful software programs, and more. Preventing these errors is simply a matter of performing certain actions so that your computer is secure and your registry is clean and functioning at the highest level. This will stop registry errors while improving the speed and performance of your computer, and making your system much more stable.

Registry Error Solutions That Do Not Require Technical Assistance

You should have a couple of software programs installed, an anti virus program and an anti spyware program, because these will prevent any harmful programs from infecting or using your system and causing registry errors. Make sure that the definitions for these software programs stay current and up to date against the latest threats, and scan your system regularly to detect them. This will prevent any harmful programs from changing or deleting any entries and keys in the registry and prevent registry errors.

Cleaning your registry is the best way to prevent and repair any registry errors, and this can be done the hard and risky way or the safe and easy way. Manual editing of the registry is possible, but it is not recommended by the experts because of the time and risks involved. The registry may be extremely large, and it takes a long time to go through each individual entry and key in it, usually days or weeks. This requires a tremendous amount of work and patience to do, and most people do not have the time or patience needed for this chore.

Manual editing is very risky, because one small mistake can delete a critical entry for the operating system and lead to system failure, and the possibility that your computer may never work again. This is a very real possibility, even for experienced technicians, so if you do not have the knowledge or experience needed do not attempt any manual editing of the registry.

A better alternative is to use a registry cleaner, software created to safely and efficiently clean your registry with no risks involved. These programs can clean the registry in minutes, instead of days or longer, and there are no risks, because the software was developed to recognize critical entries so they are not edited. This will allow you to quickly clean the registry and eliminate registry errors, without the fear of causing damage or system instability. The performance and speed of your PC will increase as well when your registry is clean, and the Registry errors will disappear like magic.

Brian Williams is a self-confessed PC fiddler dedicated to ’spreading the word’ when it comes to fixing PC errors and helping people make the most use of their PCs. For FREE ACCESS to more PC tips n’ tricks, just visit Optimize-Your-PC.com.

‘Virtual memory’ is a term that is heard from the day we are born in today’s society. Everything virtual is more natural to younger generations than the trees of a park or the rippling water of a shallow creek. It seems that more and more can be stored and done by virtual methods every day. But, have we reached the limits of virtual memory usage or have we simply not found the depth of the well to date?

If we are talking about the amount of virtual memory available on the average desktop computer, then the answer is both. Since we haven’t yet capped the size of the personal computer in virtual memory capacity, we can’t truly know if we have found the bottom of the well or not. What we can ascertain is whether each individual spigot to the well has a depth equal to the algorithm that rules the ratio of all virtual memory on a system to the amount of available and usable virtual memory on the same system.

If your system has 4GB of available virtual memory, then only 3GB can be accessed and used. The additional 1GB is used for operational resources that allow you to run all those applications that are using the available virtual memory. If it were available, there’d be no memory space for your computer to keep track of all the applications running on your computer.

Each year, personal computers grow larger as we begin to demand more space for our daily lives in the virtual realm. Many people work from home and are finding that running a business on a computer requires large amounts of virtual memory. Computer manufacturers and designers listen, increasing the much coveted space available virtually for our use.

If the trend of growth in the size of computers increases as it has been for several more years at least, then we haven’t come close to the bottom of the proverbial well. We have only dipped a few buckets and withdrawn a sampler of what’s available. With this in mind, our current limitations won’t be the same as our future limitations.

If you do try to run more than your computer will handle, your computer will complain with a warning that it can’t run the requested application because it is out of memory. At this point, you can shut down applications you may not be working on and then run the desired application, or you can invest in some memory upgrades. Keep in mind that not all systems are capable of being upgraded easily, as is the case of the laptop computers. If you are forever finding yourself out of memory, it may be best to cut back on how many applications you run simultaneously.

Technology will keep increasing our available virtual memory, but for now there is a limit in the infinite world of virtual memory upon our desktops and laptops. Perhaps in ten years, that limit will no longer exist. However, maybe we already have plenty of virtual memory since more memory only indicates more work, more hours spent producing, and less living.

Victor Epand is an expert consultant for computer memory, PC supplies, and computer games. When shopping, we recommend the best online stores for PC supplies, computer accessories, computer memory, Virtual Memory, and used computer games.

Almost everyone has heard of Memory and Disk Space. Many mistakenly use the two terms interchangeably, as if they had the same meaning. However, while they are related, the differences between them are vast enough that they cannot be used as one term. Think of it as the difference between your short term memory and your long term memory. You meet Mary today. By tomorrow, you may forget her name. But, next week, you may be able to pull up all the details of the meeting if asked to do so. Memory and Disk Space are similar in relationship to this example.

Memory or RAM is short for Random Access Memory and is known as a volatile or temporary memory type. It can be lost and often is. It can be used to hold new information, just as your short term memory does. When something new demands your attention, your short term memory transfers the previous information to the long term memory vault.

In computers, this is the equivalent of saving a document before closing it. When you save a document, its contents are transferred from RAM (temporary memory of the computer) into the hard disk (long term memory of the computer). If the process is interrupted by power failure, cancellation by user, or a number of any other such scenarios, then the contents of the document are “lost”.

It is similar to what happens as we sort out important, save-worthy information from our short term to long term memories. We won’t remember that we counted six dots on the back of the fourth ladybug caught in a jar that day, but we will remember that today we are supposed to go shopping for groceries if we want to eat tonight.

Disk Space is space on the hard drive, the place where the applications you use on your computer are stored. When you open or run a program, the program is first loaded from the disk into your computer’s RAM, and the program instructions are then executed from RAM. The computer can only process instructions that are in RAM. Therefore, for any program to be executed, it has to first be loaded from the disk into your computer’s memory. RAM is also used when we create documents and image or other files.

However, RAM is volatile memory - the contents of RAM get “wiped out” when we switch off the computer or if there is a power failure. If information is “deleted” in RAM, it is simply not saved and the computer has no record of the existence of that information. This is why it’s so easy to lose open documents during a computer runtime error commonly known as a “crash”. Documents currently in RAM that aren’t saved during a sudden loss of power, or while turning the computer off, are also lost.

Whenever you type a new document, whatever you type is initially stored in RAM. But, since RAM is volatile or temporary, if you want to preserve what you have typed, you will need to save your document. When you issue the Save command in your application, the information you have type which is in RAM gets transferred to the hard drive and is stored in a file.

As you can see, the memory (or RAM) and disk space are related. They are inter-dependent on each other for your computer to operate correctly. As you use your computer, it transfers applications and data from the disk to RAM when needed. This data is then manipulated in RAM. The contents of the RAM have to be saved to return any changes back to the hard disk. If not, anything in RAM that isn’t saved will be lost.

Data or files on a disk can be deleted, as well. When a user “deletes” a file, be it operational system files or application files from a favorite program such as MS Word, iTunes, or a graphical program used for image editing, the files are not truly erased. Instead, your computer simply marks the space as available and the program or deleted material is inaccessible to the user.

When the computer needs the space that the deleted program or document once claimed, then that space is overwritten with new information. However, if the deleted file’s old space is never needed by the computer, the material remains on the hard drive. This realization has given birth to forensic computer science as the material is obtainable if you have the right equipment and can access the hard drive’s storage space with specialized programs intended to retrieve deleted files.

Victor Epand is an expert consultant for computer memory, PC supplies, and computer games. When shopping, we recommend the best online stores for PC supplies, computer accessories, computer memory, RAM vs. ROM, and used computer games.

Is your computer going “Bonkers”? Are you going crazy trying to figure out why? You may even think its time to get a new computer, but that just isn’t really necessary. You may only need to run a registry cleaner which will put your computer back into tip top shape.

I have worked with many clients computers over the years, and have been called in by desperate people, people so anxious they just don’t know what to do. Some of them are even crying in desperation by the time they call, and all of this, is because they so desperately need to access their computer, work or just surf the web, and the can’t because the computer is running so slow, or is just doing crazy things.

The first question I am always asked is: Do I have to buy a new computer? I just got this one six months ago! Do they break down that quickly? Of course not! We always manage to solve the problem and usually do it pretty quickly. And we will get into how that is done in a minute, but first let’s examine the other side of the coin.

Other calls I sometimes receive are from clients that say, “look I’m running an old Pentium II computer, and the screen just went dark. It has been working fine for a long time, should I fix it, or buy another PC.” Well, that old PIE computer is about 15 years old, so I usually recommend they buy a new pc. What is the difference between these two people?

Why is one person hysterical because their six month old computer is not working right and the other pretty calm because a 10 year old computer broke down? You might think that it is because one person knows how to use the PC and the other doesn’t, but this is not really the case. The reason why one computer lasted much longer than the other is because the person with the older computer knows how to perform basic maintenance and run a registry cleaner on their PC system, and the person with the newer computer, probably doesn’t even know that maintenance needs to be done on the system, and definitely doesn’t know what registry cleaning software is used for.

When you run a registry cleaner regularly, you keep your PC running smoothly and you avoid turning your computer on and having all the icons flashing on and off, or having files disappear from their usual place, or having your computer freeze up on you all the time. You no longer have to turn on the computer, and run to the grocery store while you wait for it to load up (unless you have a PIE that is). Just as you clean your house, garage, or wash the car, your computer also needs to be clean and that is what a good Registry Cleaner can do for you.

What is a registry cleaner?

A registry cleaner is a program that cleans up the computers registry and puts everything back into its original place. A good registry cleaner will also let you set your own options, do a back up of your registry and show you what it is doing. One of the best registry cleaners on the market today for all windows types is RegCure registry cleaner.

What is the “registry”?

Ok! so you know what the registry cleaner does! It cleans your computers registry! But what is the registry? Everyone wants to know, but doesn’t want to ask for fear of looking dumb. Well, don’t worry most people don’t know what the computer registry is because they actually never see it, but that doesn’t mean it doesn’t exist. The registry is the place where windows stores your data and all your settings, any changes to your software, and your configuration. As you can see it is an essential element to your computer. Its the place where everything is stored.

As you use your PC you will make changes to your registry just by saving documents, music, and pictures. I have had people tell me that they don’t do anything but surf the web so their registry should be clean. But even surfing the web will change the registry. Adding and deleting programs, information, or changing pages will add and delete information from the registry and this leaves traces in the registry. After a while the registry will become bogged down or will slow because of those traces of information. That is why a registry cleaner is so important because it cleans up these unwanted traces and puts your PC back in optimal working order.

You can download a free trial of the best registry cleaner from Mehmet’s website. He shares some of the things he learned in 10 years experience. Visit http://www.registryheal.com/ today!