The most important thing is to be attentive to all trifles, especially with regard to the access of their data or computers to other users, even if they are very close people. The second thing you need to know is that if your computer wants to be hacked, no antivirus will help, you will be hacked if you want. The third is not to open the left links and sites, do not run incomprehensible files and programs, do not specify your data anywhere!