Never mind, the list of possible victims is discouraging. Under Windows 95 and 98, installing a program leads to a wide assortment of changes in critical Windows files, including the all-important Registry. As a result, if you have installed a program and decide you hate it, you can't just delete its files. You have to use an uninstaller capable of combing all the crevices of Windows and removing every reference to the program they contain. If you don't, you'll start getting weird messages, find that you cannot run other programs or even run into conflicts when you install new software.
Some programs come with their own uninstallers.
But the Windows uninstaller and those that come with some programs are weak sisters. Often, they only do part of the job. Enter Quarterdeck's CleanSweep and Cybermedia's Uninstaller, two powerful program zappers. Beyond using them to remove programs, you can also use them to delete files and registry entries left behind by programs you removed before you came upon CleanSweep or Uninstaller. But these uninstallers have to be handled with care.