42 Computer security service, namely, restricting access to and by computer networks to and of undesired web sites, media and individuals and facilities; Computer services, namely, on-line scanning, detecting, quarantining and eliminating of viruses, worms, trojans, spyware, adware, malware and unauthorized data and programs on computers and electronic devices; Computer virus protection services; Maintenance and upgrading of computer software; Maintenance of computer software relating to computer security and prevention of computer risks; Technical support services, namely, troubleshooting in the nature of diagnosing computer hardware and software problems