42 Providing computer security services, namely restricting access to and by computer networks, websites, computer files, media, individuals and facilities, parental control; providing on-line security services for electronically transmitted credit-card payments; providing back-up computer programs and facilities; providing automatic encryption for on-line computer users; computer services, namely, providing software interfaces available over a network for promoting the sale of goods and services of others via a global computer network with hypertext links to product and service purveyors for the purpose of purchasing products and services; providing software interfaces available over a network for dissemination of advertising for others via on-line electronic communications networks; computer services, namely, acting as an application service provider to host the applications of other; technical support services, namely troubleshooting of computer hardware, computer software, and network problems; computer and computer software consultation services