Operating system Windows (9x, Me, XP, Vista, Seven) Free navigation in the file structure, ability to optimize and configure systems. Owning the introduction of new consumer programs into the system. System cleaning and maintenance with anti-virus programs. Good knowledge of office programs (MS Word; MS Excel, MS Powerpoint, MS Outlook), perfect use of archivers (RAR, ZIP), internet navigation programs, MSIE, Opera, Firefox, Chrome