Computer security consultancy; 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, individuals and facilities; computer security service, namely, enforcing, restricting and controlling access privileges of users of computing resources for cloud, mobile or network resources based on assigned credentials; maintenance of computer software relating to computer security and prevention of computer risks; technical support, namely, monitoring technological functions of computer network systems; updating of computer software relating to computer security and prevention of computer risks