All you need to know about QR codes

What are those black boxes that look square bar codes? Are they useful for something? How I can interpret? If you do not know that they are "those strange black boxes" that you can see everywhere, from magazines to soda cans, this article will explain everything you need to know about the increasingly popular QR codes .

What are QR codes?

Basically, QR codes (Quick Response Barcode) is an evolution of popular barcode. A standard that allows a two-dimensional graph representing more than 4000 alphanumeric characters.

Why use them?

Initially, the QR code is used by automakers for the management and inventory control. Currently, there are many sectors that used to share information in a visual way: IT companies, software developers, advertising agencies, media, among others.

How do you read?

To read or interpret a QR code requires a device with a camera and a compatible reader. Previously, these requirements were a major drawback. Only companies readers could have designed exclusively for this.

But now, thanks to the new generation of mobile phones, much of the population meets the requirements. Hence, in recent months, its popularity has grown exponentially.

How do you create?

Create a QR code is easy. You only need a QR code generator . There are applications for Windows, Linux and Mac, but the fastest and simplest is to use online services like those offered by Kaywa , MSkyNet or invx . Just select the type of information you will enter (eg, URL), enter your text and click generate. It’s that simple.

What program use to read QR codes?

Currently, the Internet can find dozens of readers able to read and interpret these codes. Everything depends on the operating system of your mobile phone and nothing else.

But as time is money, then we recommend the QR code readers are most relevant to Android, iPhone, Symbian, BlackBerry and Windows Mobile.

QR code reader for Android: Barcode Scanner

Barcode Scanner is a versatile QR code reader. In addition to reading and interpreting this standard, the program is able to capture other forms of bar codes and launch Internet searches for references.

QR Code Reader for iPhone: i-Nigma

Using i-nigma and the camera of your iPhone will be able to find out everything that is hidden behind a QR code. It also supports other codes such as DataMatrix bar. Additional features make it the ideal program to share code with other users.

QR code reader for Symbian: Barcode Reader

Barcode Reader is a utility that lets you use the camera pre-installed on your mobile phone to read QR codes, BIDI or DataMatrix. From Barcode Reader options can save your QR code data in a bookstore, send codes via SMS, email or Bluetooth.

QR code reader for BlackBerry: Beetagg

If you have a BlackBerry, your QR code reader called Beetagg, a utility that enables you to read and interpret QR codes using the default camera available on your device. It is compatible with other formats such as DataMatrix or BeeTagg Code.

QR Code Reader for Windows Mobile: i-nigma

Yes, i-nigma repeated. Like the version for iPhone, i-nigma for Windows Mobile is one of the best solutions, available for reading QR codes on your device. It is very easy to use, supports both as DataMatrix and QR codes to share codes with other users.

What now?

Once the reader installed on your mobile phone is the time to take action. Here we list three examples of QR codes for you to practice and discover for yourself the endless possibilities that this new way of presenting information to offer.

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How to recover password from Acer eRecovery

The hard drive of Acer Aspire contains a hidden partition called PQSERVICE. Many people find to rebuild or modify the partition table, or when booted from a Linux Live-CD. Has a size similar to a dual-layer DVD contains a few folders. But what you do there? What is it?

This is the partition in which the manufacturer stores operating system installers and programs including factory (OEM) as well as drivers and other diagnostic tools. Size is approximately ten gigabytes.

Since the scheme came into vogue, manufacturers have failed to deliver recovery CD or DVD, preferring to rely on integrated solutions: push a button and the computer recovered from the hidden partition system. This, however, does not always work.
Launch with Alt + F10 eRecovery

In the Acer Aspire eRecovery function is responsible for access from the BIOS to the hidden partition and launch the system recovery. It is activated by the keyboard shortcut Alt + F10, before the operating system has started to charge.

eRecovery

eRecovery does not work if there is first provided password. By default, this usually is 000000 (six zeros). Suppose we do not accept (because, for example, has changed in the past) is an irritating situation, but there is a fairly rapid solution available.
Recover password with Ubuntu

Have ready a bootable Linux distribution from a CD or DVD, like Ubuntu or Knoppix , always good. The latest load automatically all partitions, including ocultas.Si PQSERVICE not see the partition on the desktop, you have to first mount, a move that requires only a few commands. Open the terminal from menu Applications> Accessories and type the following:

rootsudo passwd sudo mkdir / mnt / pqservicesudo mount-t ntfs-3g / dev/sda1 / mnt /-o force PQSERVICE

The first line serves to create a root password in Live version of Ubuntu. The second command enables a mount point for partition, while the third PQSERVICE mounted partition, which will appear on your desktop after a few moments.

El fichero aimdrs.dat

Normally, PQSERVICE is the first partition on the disk (hence the path / dev/sda1). To be safe, use the cfdisk command to check what is the correct partition. Once mounted, you must open the file AIMDRS.DAT. Contains, in pure text, user and password eRecovery. Try this simple command:

nano / mnt / PQSERVICE / aimdrs.dat

The password is just happy after the "PD =". Record it in a slip and restart the laptop to access eRecovery again. Now you can reinstall the operating system without recovery CDs.

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Nero 9 Essentials, the free version of Nero

Months ago, when I asked Nero if you have a lightweight version of its better-known suite of recording, the response was unclear. Yesterday was a much clearer: Nero 9 Essentials , a free version of its flagship cut.

After enduring the direct jurisdiction of excellent free alternatives , Nero seems to have awakened from their slumber. The intention is good: getting rid of irrelevant features and give the user a free sample of their reliability and power. But what has he got? Nero 9 Essentials Is burning software that everyone needs?

If anyone thinks that Nero 9 Essentials is a return to the simplicity of the first Nero was wrong. It is, in fact, the module StartSmart limited to two functions: data recording and copies of records. You can not create audio discs nor burn ISO images.

Grabacion con Nero 9 Essentials

For many users, these two functions will be more than enough, but we must not forget that hardly differ from what Windows is capable of doing by default. Nero 9 Essentials covers more than one hundred megabytes on your hard disk, a figure excessive in relation to their capabilities. It’s like killing flies with cannon fire.

Publicidad en Nero 9 Essentials

Criticism and equally understandable is the inclusion of advertising. The last three buttons, instead of activating the corresponding functions, promotional display boxes inviting us to buy the full version. The icing comes when you press F1: Nero 9 Essentials has no help files.

Nero 9 no tiene ayuda

One can argue, in defense of Nero, in a simple aid program is not necessary. And it would be right. But his inclusion, at least as regards the solution of common problems, had not been so ludicrous.

A missed opportunity?

El icono clásico de NeroNero has taken the road is commendable free (better late than never, some would say), but their focus has been more conservative than we can hardly speak of an application "essential." The limitations are too great to ignore.

The positive thing is that, at last, the reliable engine of Nero is available worldwide at no cost. But to be honest, many would have preferred to see a free version of Nero Burning ROM rather than a cut StartSmart.

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Two programs that will help prolong the life of Windows

A few years ago, every so often we had to reformat the hard drive and reinstall the entire system from scratch. This procedure was once the most "normal" world now, fortunately for all, is not so common.

There are precedents for users that carry more than 2 years without a cleanup. Not many fortunate, but some are. And this, what is that? Is Microsoft now makes their systems more stable?

Joking aside, what is the reason why now and not before, we can be even years without reformatting and reinstalling? The answer can be found in the proliferation of software maintenance and optimization. Tools to detect and repair problems in the bowels of the operating system and lengthen, thus, life.

There are plenty of programs that deal with this. Just take a look at the category of analysis and optimization of Softonic.com to check. But what are the best?

The answer is somewhat complex. Much depends on the experience of each. But there are two programs that stand for themselves. Two programs that will help you in some way, to leave the operating system on your PC clean as a patena.Si want to extend the life of Windows to the absolute limits and to avoid, thus wasting time reinstalling everything we recommend: TuneUp Utilities and Glary Utilities.

TuneUp Utilities

Without doubt, TuneUp Utilities is a reference for other programs. A program that includes in the same environment all the tools necessary to perform maintenance on your system. With TuneUp Utilities can remove obsolete files or temporary files, analyze and repair problems in your Windows registry, manage the system startup, among other interesting possibilities.

Glary Utilities

The free alternative to TuneUp Utilities. A program with everything you need to be able to get rid of all those elements that reduce system performance. Although in a less intuitive, Glary Utilities lets you delete temporary system registry clean, fix and repair shortcuts, uninstall programs, optimize boot system, among other things.

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Revive the PC (III): Safe Mode and restore

While a basic version for a few, some people do not know yet. The failsafe mode is also a somewhat bizarre translation of Safe Mode, Or safe mode, a good tool to solve some errors.

To access it you have to Press F8 during boot Windows and then select the option. If there has been a problem in starting the last time you start Windows, then we will direct the selection menu, without pressing any key.

Unlike the normal start while booting Windows in Safe mode we do not get a – pretty? – Display a progress bar, but the screen fills us with the list of files. Each file loaded by Windows appears there, so if the boot is cut to get to one in particular, at least we will know where is the problem.

Benefits Safe mode:

∗ Load default drivers for all devices, which prevents the system to crash if the problems are caused by one particular
∗ No additional software starts at the beginning, so it tends to sneak viruses and Trojans that do affect the normal boot
∗ If you need to replace a system file, it is possible, depending on what is "that this file is not in use, since Safe Mode loads fewer files
∗ You can do a System Restore safely

System Restore

If you’ve ever wondered what lies beneath the mysterious folder Volume Information SystemThe solution to this enigma is, yes, exactly, to restore the system files. Although it may seem magical, the truth is that nothing is further from the truth.

System Restore is only a copy (Actually several) Windows periodically makesAs well as to install some programs or on request Windows registry and files that have changed.

Its main aim is to make Windows the way it was a few days ago, which is not always able to do too much expertise. It is for this reason that should not be used lightly. Do not destroy your computer or set fire to your house, but you could cause an occasional unnecessary headache if you use it all the time.

Turns on and off since Control Panel / System / System RestoreBut by default it is enabled. From this window you can choose the disk size will be reserved for this function in each unit. If you have multiple hard drives, you can disable this feature in those without Windows installed, it will generally not be helpful.

So your Windows is knackered and want to try to restore it? All right. In this case the first thing you do is open the program in question, which is hosted in the start menu, plant Accessories, System Tools door. You will see a window where you can choose from System Restore to a previous state or Create a restore point.

After clicking on the second option, we will get a calendar. The days marked in bold are those where there is a saved backup. So, now plays to remember and think about the last day I remember that the team worked perfectly, to select the last copy that we serve.

Once elected, and as we click Next, Windows will tell us a story about the system will reboot, and it is. From now on we can only sit back and see how Windows does the dirty work. Restarts, it will change and perhaps is restarted again. When finished, a window it will tell us, reminding us that if something goes wrong, we can undo the changes from the System Restore tool (now see a third option for it).

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8 essential programs that by themselves are worthless

Many people do not know exactly what they are. But without them in some cases your browser, and in others your system will be crippled. We talked about a whole series of programs needed when a video, animation, connecting to a webcam or run a program. Surely you are missing and you’re left with an inch of his nose when the browser has shown you a message like "you need … to open …" or an installer told you can not continue.

In the case of the browser, usually allows the program to automatically download of the day, but nobody knows why, these links fail more than a gun fair. So it is better to do on our own and how much to let the browser updates. If the installers do not always carry the language bookstores in which the application is scheduled.

1. Java Runtime Environment (JRE)

This is the Java runtime environment, ie, only the portion required to run the programs developed in Java. Sure on many occasions has appeared to you a picture of a cup of coffee when you open a web page. In all these cases, JRE is needed.

A peculiarity of this virtual machine is constantly updated often, a fact that makes it recommended to enable automatic updating.

2. Adobe ShockWave Player

This plugin makes it possible to run various multimedia contents on all games and presentations. Run files created with Macromedia Director *. DCR.

3. Adobe Flash Player

Often confused with Adobe Shockwave Player. In this case, play SWF files, usually created with programs like Macromedia Flash and Macromedia Flex. Such files can be run from the PC or the browser, in which case the format is Active-X or Plugin.

4. Microsoft. NET Framework

. NET is a software development platform from Microsoft. This means that many applications need to have installed the libraries of this Framework to run.

5.DirectX

This is a library of multimedia drivers for Windows. These enhance the graphics and audio performance. For most modern games is essential to have it installed.

6. GTK + 2 Runtime Environment

GTD (The Gimp Toolkit) is a set of bilbliotecas for developing user interfaces (GUI). Originally created exclusively for GIMP, the image manipulation program. However, now serves a variety of programs for Linux.

7. Visual Basic Runtime Files

Visual Basic is a programming language used by Microsoft. Although it falls into disuse in favor of other languages such as. NET, you might need it for some applications.

8. Microsoft Core XML Services

Also known as MSXML, this package installs in the system libraries needed by programs that work with XML, extensible markup language.

We could add some more as WinPcap is a library to monitor data traffic on network devices.

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