42 Maintenance of computer software; Maintenance of computer software relating to computer security and prevention of computer risks; Providing temporary use of on-line non-downloadable software and applications for management, validation, encryption, delivery of, and recovery from, software updates to computer devices.; Providing temporary use of on-line non-downloadable software and applications for recovery, diagnostic, and antivirus protection of computer devices.; Providing temporary use of on-line non-downloadable software and applications for management of cryptographic credentials of computer devices.; Providing temporary use of on-line non-downloadable software and applications for maintenance of computer operating systems.; Providing temporary use of on-line non-downloadable software and applications for access control for computer maintenance and software upgrade operations.; Services for maintenance of computer software; Services for updating computer software; Updating and maintenance of computer software; Updating of computer software; Updating of computer software relating to computer security and prevention of computer risks