You have found a fundamental problem with today's software developers. Whilst they are keen for you to download and install their software, they are less than keen for you to remove it, and their uninstall procedures are often lacking in their thoroughness.
There is little you can do. Many software developers install files all over the hard disk, in particular in the Windows/System32 folder, Documents & Settings folder, and elsewhere.
Some of those you will never find and even if you do, deleting them can be hazardous to the operating system, because you can't be sure they are not crucial to how the system works.
What you can do, is once you have uninstalled the software, hunt down any remnants using either Windows Explorer, (or My Computer), and looking inside the folders Program Files and Documents and Settings for a folder with that software's name, or using your Search option from the Start menu and search for that software.
You can then manually delete the files and folders. But deleting from anywhere else is not advised.
I'm not sure what you mean about deleting DSL and Earthlink files. If your internet connection stops when you do, then it seems the connection needs those files.
Also I am not sure what you mean by books in Adobe and files in Word. Adobe books, (.pdf files), can just be deleted, and Word .docs can also be deleted. Just find them on the hard disk and delete them.
Not sure what you mean by 'deleting them in one place'.
Goodmorning, I have files on my computer that I want to delete. I like to download the free trial games and i uninstall them but it seems as if it is in a lot of other places I don't know about. I also have at&t dsl and earthlink dsl on here. I don't use them but when I try to uninstall them then I can not use my road runner anymore. I have books in adobe that i want to delete and files in word that i want to delete but just deleting them in one place does not help.What should i do?