It’s the same as Windows Defender, except it’s not pre-installed.
Important: the “Windows Defender” you might find pre-installed in some earlier versions of Windows is Every so often, Windows Defender comes under fire for rating lower than other security packages in tests published online.
On the other hand, I fully recognize that Windows Defender might not be the right solution for everyone. This is where I run into some difficulty trying to make recommendations. Tools that were once clearly free, have on more than one occasion, moved to promoting their paid product so heavily that the free version virtually disappears.
Just as you can copy a file from one disk to another and have copies on both disks, a computer virus is in part defined by its ability to make copies of itself.
Conversely, copying data from your computer or device to an internet server is considered an download.
Windows Defender comes pre-installed in recent versions of Windows. exactly what you want from your anti-malware Anti-malware tools are tools that attempt to prevent, detect, and remove, all types of malware.
Various forms of advertising, including additional toolbars, homepage hacks, and data insertion (while technically not a form of spying) are often also included in the term to determine the presence of spyware.
Virus detection is more typically data-based, looking for specific patters of data that indicate the presence of a virus.
While “up there” is so exceptionally vague as to be meaningless, it does at least imply a difference in altitude: the device in front of you sits, conceptually, lower than remote servers or services on the internet.