Installation, maintenance, and updating of computer software; Technical support services, namely, troubleshooting in the nature of diagnosing computer hardware and software problems; Updating and maintenance of computer software; 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 security service, namely, restricting access to and by computer networks to and of undesired web sites, media and individuals and facilities