malware
noun [ U ]
uk/ˈmælweər/ us IT
software that is designed to damage the information on other people's computers, and prevent the computers from working normally:
If running a virus scan doesn't solve the problem, it may be due to a malware program that's too new to be caught.
Malware is short for "malicious software" and is a catch-all term for viruses, spyware, worms, browser hijackers, etc.