Depending on your BIOS software, go to Advanced Settings, look for Virtualization (Technology VT), make sure that it's Enabled.
https://www.virtualbox.org/wiki/Downloads VBoxManage --version
3. Download popular SSH client PuTTY.exe from www.putty.org (do not need installation)
https://site.ada.edu.az/~aadamov/sources/downloads/ or http://isoredirect.centos.org/centos/7/isos/x86_64/CentOS-7-x86_64-Minimal-1708.iso
Specify Name, type (Linux), version (Red Hat 64) and follow to default paramenters
- right click on VM
- select Settings
- select Storage tab
- select Empty under Controller: IDE
- on right side in Attributes click to small disc icon on the right of Optical Drive
- browse and select Centos .ISO Image file
- right click on VM
- select Settings
- select Network tab (Adapter one already assigned to NAT to enamble VM access to host computer's network and Internet)
- select Adapter 2
- check Enable Network Adapter
- select Bridged Adapter
- specify root password and create user (login/password)
- when installation completed enter to system using login/password
- enter IP addres to Host Name (IP address) and click Open button
- you should be asked to enter login/password