A nickname for EMD SD9 locomotives, in reference to their smooth ride quality reminiscent of a Cadillac automobile. This nickname is said to have originated on the Southern Pacific Railroad.
Microsoft's Windows Malicious Software Removal Tool (MSRT) is a free program that removes a whole host of the most popular malicious software (malware). Many Windows users have it installed and run it monthly, yet are not aware of its existence.
Windows Defender is a free program that Microsoft includes with Windows 10. It protects your computer from spyware, viruses and other malware (i.e., malicious software that harms your device). It used to be called Microsoft Security Essentials.. It's turned on by default when you first start up Windows 10 but can be turned off.