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How to Fix common Dll errors

As well as incorrect, duplicate, or missing registry entries there are many other problems that may befall the DLLs on your system. It is possible to recover from virtually any error, but it may require some work, and may also mean a loss of functions in some programs. One of the leading causes of problems is an incorrect DLL version being called, and this can occur frequently. It may require the installation of several versions of a DLL, although most are backwards compatible.

Missing DLL – this means that a call has been made by an application for a particular DLL. However, that DLL could not be found. In some cases this means that the DLL file in questions can not be found on your system. However, when a DLL is called, the application must provide a path to that library.

As such, a missing DLL error can occur in cases where the actual DLL name does not match the name of the DLL being called.  It may also mean that the path that is being called does not match the actual path of the existing DLL. The DLL may be on your system, but it is possible that it could have an incorrect name or be in the incorrect location. This could be an error with the DLL itself or with the coding of the application causing the error.

Corrupt DLL – a DLL, like any other file or folder on your computer, can become corrupt. They become corrupt for one of a number of reasons. Spyware or virus infections can certainly lead to a number of important files on your system becoming corrupt. If you have manually attempted to alter the contents of a file, then this too can lead to a corruption. An interrupted installation, or even an interrupted execution of the DLL may also lead to a corrupt DLL error message.

Spyware and Virus Infection – Spyware applications and viruses are rife. Even with Anti-Spyware software installed it is possible that you could have contracted an infection on your system. When this occurs you will most typically be informed that the DLL has become corrupt and cannot be used properly. However, some infections may attempt to alter the contents of a DLL so that it can still be executed. This may be done so that it executes a very different function, or so that your system hands or freezes because it is attempting to complete a never ending function.

Incorrect DLL Version – DLLs are updated fairly regularly. This will soon become evident should you begin the search for one either on your system or from a third party website. In some cases, if you have the incorrect version installed on your system then this may cause errors. However, most DLLs are backwards compatible. This means that if you install a new version, but another application is calling for an older version you should not experience any problems.

Where errors of this nature tend to occur is when one application installs an older version of a DLL, while an existing application is demanding an older version. These errors are relatively rare, but when they occur, they can be the most troublesome to resolve.

General Protection Fault (GPF) – a General Protection Fault typically results in an error message that reads something along the lines of “...has performed an illegal operation and will be shut down”. You are then forced to shut down the application, or it will be automatically closed down. Typically, you will continue to receive this error either when you try to open the application, or when you attempt to run a particular function within that program.

A GPF usually occurs because a DLL no longer exists at the given location. The Windows Operating System or the application itself will display the GPF in order to prevent a total system crash. The software has called the error message rather than shut down your system. If the call for this error message does not exist then you may receive a more serious error.

These are only some of the more recognizable problems that can occur with your system associated with DLLs. There are many other problems that may manifest themselves in different ways. System crashes, the blue screen of death, and software that freezes may also be indicative that you have a problem with a DLL file somewhere within your system. Typically, each problem has its own resolution but there are certain things you can do to attempt to resurrect your computer from these errors.

DLL hell – is a generic term that refers to virtually any problem associated with DLLs. However, it most commonly refers to problems with DLL versions that manifest themselves as poorly operating software. There are two leading causes of DLL hell, though both have become more obsolete with each new version of Windows that has been released, patched, and fixed.

If a working DLL is overwritten with one that is incorrect or contains incorrect data then you will receive an error. This is slightly different to the corrupt DLL problem above, but can cause serious problems when trying to use the functions of an application that require this DLL in particular. This was more of a problem when the exact contents of a DLL were first published on the Internet because incorrect versions were released at various locations. Once these incorrect DLL versions were installed they overwrote the correct version and software began to fail as a result.

This problem was largely fixed in Windows 200 onwards. Windows File Protection, usually referred to as simply WFP, ensures that your essential DLL files can not be easily overwritten without the appropriate permissions. This has all but eliminated this problem from most people's computers.

When a DLL is loaded onto a system, Windows will continue to use that version of the DLL, until all applications have finished using it. This means that if one application were to open a DLL from the system folder, and then a second application required a DLL with the same name but from the software folder, Windows would not attempt to open this second version. It would incorrectly attempt to use the first version that was not designed for the job in hand. This would typically mean that you would begin to experience problems when trying to open software in a particular sequence.

This problem was fixed in Windows XP. Windows XP opens separate versions of a DLL for every application using it. Because of the power, or more accurately the RAM, of modern setups, this does not tend to cause your system to run any slower but means that each application can open its own version of a DLL file as required.

For the most part DLL hell has become an obsolete problem. Windows updates and new releases have ensured that what were once common problems are now only really a problem for those of us that use older versions of the Windows operating system. There are manual workarounds for each of these problems, but they are not ideal.

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