So, what are these DLL files and why should you worry about them? Well, DLL is an abbreviation of Dynamic Link Library. In simple terms, these are files that perform common processes used by different programs. So, instead of having similar files in all different programs, the creators of the operating system have some common files known as DLL files that can be called upon for service by multiple programs. This approach was very useful in the days of limited memory and other computer resources.

While DLL has been acknowledged as a great idea to save system resources and to enhance PC performance, it is susceptible to some problems. Some of the common DLL files that are known to generate DLL errors are rundll, msvcp71.dll and framedyn.dll. It is important for you to understand why DLL errors happen as it will enable you to understand its fixes.

1. You may unintentionally remove a DLL file while uninstalling another program 
2. You may be trying to install a computer application or program that has an invalid or corrupt DLL file
3. Hard disk problems may lead to corruption of a DLL file and cause DLL error
4. A new DLL file may accidentally overwrite the old DLL file and this new file may not be compatible to the existing applications using that file.
5. Finally, a malware infection from a virus or a spyware may be behind the DLL errors.

There are various methods of fixing DLL errors. Whenever you come across the error message related to DLL, it also displays the name of the file that has developed errors or has been removed. You must begin by making a note of the DLL file name. Then you must search on the Internet for that file. Finally, you must download and replace the file in the correct folder. This is likely to get rid of the error.

Another quick and easy way to fix DLL errors is to take help of utility known as System Restore. This utility is usually enabled by default on your Windows XP and Windows Vista PC.

You must also be vigilant of the process when you face a DLL problem. If you face a DLL error immediately after or during the installation of a new program, you must see if removing the program resolves the problem. If it does, it is advisable that you contact the software producer or seller and ask for technical support.

DLL errors may also occur if there are problems with related registry entries. To identify and fix these problems, you may seek the help of a reliable registry cleaner tool. These tools are designed to perform a thorough and deep scan of the registry, identify the problems, and fix them. An advanced registry cleaner also enables you to defrag the registry to make it faster and further enhance the performance of your PC.