Computer security consultancy; Computer security consultancy in the field of scanning and penetration testing of computers and networks to assess information security vulnerability; Computer security service, namely, hard drive erasure; Computer security service, namely, restricting access to and by computer networks to and of undesired web sites, media and individuals and facilities; Developing and implementing customized plans for improving computer security and preventing criminal activity for businesses and governmental agencies; Maintenance of computer software relating to computer security and prevention of computer risks; Providing technology information updates for home security systems via the global computer network; Updating of computer software relating to computer security and prevention of computer risks