Are download files useless after you install that program

* One of the biggest culprits for generating junk files are the temporary files generated in the process of installing software. Every time you install new software, the installation software will use you hard drive as temporary storage (Temp directory) for the files needed. Once the installation is finished, those files remain behind. It is important to mention that if the software is design right, these files are deleted once the installation process is finished.

* Another big culprit are the temporary files generated in the process of running software. Similar as the installation of the software, these temporary files will usually produce some temporary swap file in the process of running the software. After the software is finished running, it will leave a lot of megabytes of garbage behind. A couple of examples are the files with the extensions *.old and *.bak.

*.old -- files with this extension are usually left behind by antivirus software specially for old definitions, etc.

*.bak-- the backup files generated by antivirus software or system software when checking the hard disk.

* Another big culprit are the files left behind after uninstalling software. After the software is uninstalled, it often leaves some *.dll and *.ini files in the hard drive. Also there are a large number of obsolete data in the registry which has a big impact on the stability of the system.

*.dll - stands for dynamic link library. Every software uses and needs this files to run. These files can cause a lot of problems specially if you uninstall an antivirus software and then you install a different one. To avoid this problem with antivirus software, it is better to download the uninstaller tool provided by the antivirus manufacturer because it cleans the system from .dll files.

* .ini --The .ini file format used to be the standard for configuration files. It is still in use but nowadays the .config extension is used more often. .ini files are simple text files with a basic structure. Sometimes files using .ini standard will use different extensions like .cfg, .conf, or .txt. That is way it is very important to use software like Revo Uninstaller to uninstall software because it can get rid of all these files left behind by the default windows uninstaller.

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* Another culprit are the Temporary files generated when surfing the Internet. The browser is always downloading files to your local machine when surfing the Internet. These cache files can occupy huge amounts of space in the hard drive. Some examples of these files are the cache, history, cookies and flash files.

cache -- The main purpose of cache is to store data so that future requests for that data can be served faster. There is nothing wrong with the cache files but it is good to keep them in check. Once in a while clean the cache.

history -- As the name implies, it keeps a history of all sites visited with your browser. The main purpose of the history is to be used as a quick link for visited places. Instead of typing a web site name, you can go to your browser history and click on it to be taken to that site. You can set your browser to automatically clean the history every so often or you can set your browser to delete history on exit.

cookie -- is a piece of text stored on a computer by a web browser. A cookie can be used for several things like authentication, site preferences, identifier for a session, or anything else that can be accomplished through storing text data.

flash files -- used to add animation, video, and interactivity to web pages. Flash can stored a big amount of files in your computer and use a lot of space. If you use browsers like Chrome and Firefox you can keep flash files on check. The best way to deal with these files explained above is to use programs such as CCleaner.

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* Another culprit are files/programs install in your computer and are not frequently used. To manage this, make an inventory of the programs you have and how often you use them. If you have not used a program or file for a long time, you might as well deleted. Programs also install additional services and the more services you have running, the slower your computer will be.

There are other files that are also considered as junk:

-- duplicate files- as the name indicates there copies of the same file all over the place.

-- obsolete- When you uninstall a program, sometimes there will be files left behind that have no reason/purpose to be there.

-- orphan- similar to obsolete files. Program is uninstall and this files are left behind.

-- old minidumps- minidumps are files log by windows when the system has a blue screen. There is a reason for these files to be there but not when the bluescreen happened a long time ago.

-- broken shortcuts- Some times when uninstalling a program with default add/remove it will leave behind shortcuts for that program. You click on them and it can not be found or does nothing.