There was a time where AOL ran rampant as the number one Internet Service Provider in the United States, and by that notion, worldwide too. While the company has had to deal with the emergence of several ultra competitive rivals that have taken customers off its back, it remains a key identity in the ISP world.

AOL, however, has received a lot of criticism for its walled garden approach to allowing customers to access the Internet. Not least for its requirement that an Internet connection be made from within the existing AOL software suite.

When you sign up to AOL’s Internet package, you won’t just receive the necessary software to connect to the Internet. You’ll also receive a software suite which is AOL branded to the max, and it’s this that is used to connect to the Internet. AOL will control how you get online, and by that token, when AOL decides that it wants to update its software, there’s not much you can do but go along with it happily or refuse the update. And of course, most customers are all too willing to accept upgrades in the false knowledge that it won’t compromise their ability to connect.

It shouldn’t compromise their connection, at least. But there are known problems with AOL upgrades whereby a failed software download can cause huge problems. For example, to break things down, if an upgrade crashes during the installation period, you may lose your original connection when you try to re-access the AOL connection utility. Half copied files and half meddled settings can quickly add up to a long phone call with AOL support.

The latest AOL Desktop, in particular, caused an enormous amount of trouble with existing customers. After AOL migrated to their new CPW servers, a forced download was required for users to switch over to the new settings. The stability of this system was put under close scrutiny after many customers complained of the upgrade crashing during download and resulting in a broken connection. Other users managed to connect, but with great irregularity and the speed was down significantly.

The AOL upgrade resulted in an error that looked like the below:

“Authentication Failure” Error 47-DUN-0691

When you strip away the error code and examine what AOL has changed, it appears that the suite is now attempting to connect through TCP/IP rather than the normal DSL.

To tackle the issue, go to Start and then enter your Settings.

Choose the Control Panel.

Go to Network Connections.

You will need to choose Dial BB and connect manually, as opposed to using the typical AOL suite. Assuming there are no existing complications with your configuration settings, the connection will be made and you’ll be able to browse normally.

If this doesn’t work, you will need to roll your AOL software site back to version 9.0 when the problem was non-existent. It’s far from a satisfactory solution, but once you’ve rolled your software back, you can wait for the request to re-download the update and as long as it doesn’t crash, you should be able to successfully migrate across to the CPW servers and regain full connectivity from within AOL’s suite.

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Hewlett-Packard, better known as HP, in an American company that covers a broad range of computing needs. It offers everything from peripheral devices to fully fledged branded PCs. There’s a big chance that you’ve used an HP computer at some point, and it’s almost absurd to think that you haven’t come across an HP device of some sort in the past - whether it be a printer, a mouse or otherwise!

HP, being such a big player in the market, has been forced to cope with an ongoing demand for relevant software from an extremely diverse population of consumers. If you’re in possession of HP hardware, you should be relieved to hear that support for their devices is generally good and you shouldn’t have too many compatibility issues in getting your new purchase up and running.

HP updates are carried out automatically in some cases (notably if you’re running an HP desktop PC), but at other times, you may need to update your HP software manually. Of all the hardware that HP has released, the printer remains one of the most popular and widely used. HP printers are everywhere, but they also require a little fine tuning on occasion. HP updates may be necessary to ensure that you have the latest drivers working with the device.

It’s also worth noting that if you install an HP printer off the bat, the software that originally came with the product isn’t necessarily going to be ideal for running the printer in the modern day. It all depends on the model of course, but if you install an older printer while you have a newer printer configured with its own library of drivers and library files, the chances of a collision and the new printer not installing are high.

For this reason, as soon as you’ve installed your HP device, it’s a good idea to visit the HP website and look for specific updates related to the product. Enter the model in their website search engine, and download any updates that have been released. It’s likely that you’ll find several. Manufacturers release their hardware without being fully aware of all the potential complications that can stem from conflicting system configurations. This makes it necessary to patch their products.

By downloading the HP updates and patches, you can ensure that you’re equipped to deal with all known compatibility issues.

Most notable of all HP problems is the conflict with Lexmark based printers. If you previously had a Lexmark printer installed, you will likely need to remove the old settings and run an HP update to overwrite the printer preferences so to speak.

HP is more than just a printer provider, however. Many people rely on HP for downloading updates relevant to their operating system. If you purchased the PC from HP, you can expect pop-ups and requests that updates to the HP software are available. These aren’t always necessary to install, but it’s good to get in to a habit of installing patches and security fixes - even if you don’t think you’re going to need them today. You might very well do tomorrow.

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Do you have a Lexmark printer or scanner installed? It’s not unlikely that you do, and certainly not unlikely that you’ve at least used one in the past. Lexmark remains arguably the most popular manufacturer of printers, and certainly one of the top competitors for other forms of imaging solutions.

Just like using any form of hardware, it’s important to keep your devices up to date with the latest and best software. And more specifically, drivers. When it comes to maintaining your hardware at its optimal performance levels, the Lexmark.com website will come in very handy. It’s here where you can download software updates, security patches, and basic fixes for each and every model in the Lexmark catalogue.

Unfortunately, it’s not always as simple as choosing your model and downloading a general fix. Compatibility issues can arise just as easily from downloading Lexmark drivers as they can from installing the printer or scanner in the first place.

More worryingly, back in 2004 there was a reported case of Lexmark installing spyware on it’s customers computers. Lexmark originally acknowledged that it had installed tracking software to view the usage of its printers and cartridges before reporting back to the company for statistical analysis.

Lexmark said no personal data was taken, but that was raised in to doubt considering users were asked to fill in a registration form for “their own benefit”. The files causing the controversy were tucked away in c:\program_files\lexmark500, and they reported back to an anonymous website at lxkcc1.com - which was found to be owned by Lexmark.

Needless to say, this was not well received and many users raised a backlash against Lexmark threatening to boycott the company altogether. If you believe that you’re having problems from an old Lexmark printer which is attempting to contact another site with its usage stats, you can remove the lexmark500 entries by accessing your registry directly.

This is only an issue from old models and it seems that Lexmark has since discontinued its policy. But if you’re downloading old updates, you may wish to ensure that the tracking stats are fully removed if privacy is such an issue.

Lexmark has also suffered from several of its patches being over-ridden by other printer software. If you’re trying to download the latest Lexmark updates from the Lexmark.com website, be aware that it’s always good practice to remove software and drivers from any other printers that you no longer use.

The conflicts between Lexmark and HP printers are extremely well documented and if you’re downloading updates, that doesn’t necessarily mean that the updates will fix all of your problems if the HP printer is still stored in the registry with similar counteractive DLL files.

Lexmark.com has slowly become more reliable over time, however, and the patches seem to be better geared towards fixing the hardware in question. If you’re still experiencing uncharacteristic behavior from your Lexmark printer or scanner, you can contact support directly through the Lexmark.com website. They will be happy to assist you with any known complications and help you troubleshoot the matter.

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BAD_POOL_CALLER is a stop error message that is caused because of problems with the memory management. The error is seen when the computer is started up and displays the blue screen of death and gives the following message: “A problem has been detected and windows has been shut down to prevent damage to your computer”.

BAD_POOL_CALLER. stop: 0×000000c2 (0×000000043, 0xc2528000, 0×00000000, 0×00000000) ”

Each of these stop error parameters is for a different problem. There is a list of more than thirty such causes that can give you this error message. If the stop error is consistent every time the system is rebooted, the following method will be effective in solving the problem:

* The hardware and RAM should be checked initially.
* Boot the system once again using the OS setup CD, or use a boot setup that has a GUI like BartPE.
* With RunScanner it is possible to use a memory test tool.
* Select a single account
* If all the accounts open then the system registry hive might be the problem.
* Locate the hive damaged and rename it, do not delete it.
* Create another hive from the backup or from the restore point.
* Initially uses the latest one and keep checking the restore points that come later.
* Avoiding harvesting any replacement hives from the hard drive booted Windows.
* After which compare the hives for differences.

This is one of the ways of fixing BAD_POOL_CALLER errors. Another method is to reinstall the OS but occasionally shows a disk read error or an error on the same lines. Switching the computer off for a minute or more and then switching it on can solve it since the error is only a slight glitch in the system operation.

The BAD_POOL_CALLER is seen for the first time after installing a hardware or software it is recommended that the computer be restarted. If it doesn’t solve the problem, the installation of the hardware or software should be checked for correction. The manufacture should also be contacted if there are any Windows updates required to correct the error. If the problem persists the installed hardware and software should be disabled, and the BIOS memory options like caching or shadowing should be disabled too. The safe mode can be used as well to remove or stop components.

To enable the safe mode just press F8 when the machine is being restarted and select it from the Advance Startup options and correct the problem. The installation of the graphics card is another reason the BAD_POOL_CALLER error shows up. A simple reinstallation of the driver can solve the problem. Microsoft has also acknowledged that the BAD_POOL_CALLER Stop 0xC2 error pops up when trying to print a document that contains a corrupt font.

A hot fix is available at www.support.microsoft.com, where the telephone number can be acquired to contact support. The call to the support team is charged except if the support team has resolved that the update will solve the problem. The error message with relation to this parameter of the BAD_POOL_CALLER error is seen only in the Win2000 Professional, Server and Advanced Server Operating Systems.

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