Malware is loosely defined as software that, when installed on your pc, laptop, mobile device or server, does things that you really don’t want it to do. It could delete files, change your browser path, or create what’s known as a C&C (Command & Control) connection to an external server, allowing a hacker to connect directly into your PC without you knowing. It can run silently and hidden in the background, stealing your banking credentials when you log into the bank.