Don't Delete Windows Applications, Uninstall

For removing DOS programs it's simple, just type
DELTREE directory-name
because chances are everything for that program is located under the one
directory and no other programs interact with it. Windows is a completely different situation. When you install a Windows
program, it doesn't copy files into a single directory, and it does more
than just copy files. There will be additions to the \WINDOWS directory,
the \WINDOWS\SYSTEM directory, changes to the WIN.INI file, possibly changes
to the SYSTEM.INI file, modifications to the registry, added groups and icons,
etc.
To uninstall the program, go to the control panel, and click the add/remove
programs icon. Look for the program you want to uninstall under the list
of installed programs, highlight it and press the add/remove button. It
will ask you if you are sure you want to uninstall the selected program then
after you click OK it will remove the program in its entirety. If it
encounters any problems it will prompt you to look at the files it could not
remove and you may have to write them down and manually remove them. If
you try to remove them and Windows says the program is in use, reboot the
computer and try to delete again. After the reboot it should let you
delete it.