Repairs for security hardware for computers are best fulfilled by an authorized repair/dealer for the computer itself or the third-party security vendor/creator.

anti virus.

3 assests of computer system

-hardware

-software

-printer

A + covers many computer concepts mainly focusing on hardware.

Security + covers security only.

Computer security basically refers to the preventive and resistive measures taken to protect information, ensure integrity of the system and to prevent unauthorized access to information or computing resources.

Computer security is required to protect hardware, software, sensitive information and it is enforced using software solutions (antivirus, firewall, encryption, digital certificates, authentication and authorization protocols etc) or hardware solutions (firewall, antivirus, biometrics etc).

Along with hardware and software security solutions, formulating and enforcing strict policies and educating about threats are very important for computer security.