It is a standalone malicious computer program that replicates itself in order to spread to other computers. It often uses a computer network to spread itself, relying on security failures on the target computer to access it.

It is a piece of computer code that inserts itself within the code of another standalone program, then forces that program to take malicious action and spread itself.

It is a program that cannot reproduce itself but masquerades as something the user wants and tricks them into activating it so it can do its damage and spread.

It is a malicious program that forces your browser to redirect to web advertisements, which often themselves seek to download further, even more malicious software.

This malware is used for the purpose of secretly gathering data on an unsuspecting user.

This malware encrypts your hard drive's files and demands a payment in exchange for the decryption key.

It is a system monitor program used to provide information about the processes and applications running on a computer, as well as the general status of the computer. Some implementations can also be used to terminate processes and applications.

It allows users to view and control the hardware attached to the computer. When a piece of hardware is not working, the offending hardware is highlighted for the user to deal with.

If your computer is more than five years old, it performs slower than a new one. As more advanced software programs are released, they are optimized to run more efficiently on newer computers.

It is a computer maintenance utility included in Microsoft Windows designed to free up disk space on a computer's hard drive. The utility first searches and analyzes the hard drive for files that are no longer of any use, and then removes the unnecessary files.

Old computers are able to run new programs as well, which causes them to perform faster.