There are many anti-virus services available for users. They can offer many different types of computer protection.
有很多杀毒软件可供用户选择，这些软件能提供多种电脑保护。
英语百科
Protection mechanism
（重定向自Computer protection）
In computer science, protection mechanisms are built into a computer architecture to support the enforcement of security policies. A simple definition of a security policy is "to set who may use what information in a computer system".
The access matrix model, first introduced in 1971, is a generalized description of operating system protection mechanisms.