CleanSweep is a unique program that will specifically seek out files that are no longer associated with a program, and then ask if you want to delete them. The only time that you wouldn't want to delete an orphan file is if the file were an actual document that you created before deleting a program. If you were to say, uninstall Microsoft Word, all the documents that you created with Word would then turn into orphan files. " Click the "View" tab and then uncheck the box next to "Hide file extensions for known file types." Click "OK" and you'll notice that the files in Windows Explorer show a dot and group of three letters after their names. That dot and group of three letters is known as an "extension," and the extension explains what kind of file it is. It can kill motivation, desire, and a true willingness to create a good product. In a commercial setting, participants work for a paycheck rather than for the product. And this is what puts open source projects far ahead of its monetized competition. As a software user, this means you can contribute to an open source project as well, and help to develop it into a product that reflects your direct preferences. ) aren't always compatible with the machines that we own. This is a common occurrence when newer pieces of hardware require the programming of a newer operating system. Sure, one could upgrade the operating system to accommodate the demands of a new piece of hardware, but trouble starts when that new operating system requires new hardware in return. However since Winzip and StuffIt are the most popular, we will assume you will use either one to compress and decompress your own files. If you download a compressed file from a website or file library that ends in an .exe extension, take note that although the file is compressed, it's typically a file that will install a program onto a computer. Take the time to investigate software tools that put you in control and allow you to block access to certain websites. If you use an online service like AOL (America Online), you can use its internal Parental Control settings to block access to various chatrooms and websites. You could even block instant messaging and email from anyone who isn't a fellow AOL user.