Of course this is hard to control in a company because many people receive e-mail and open attachments automatically. E-mail programs such as Microsoft Outlook have preference menus that let you select whether you want attachments to be opened automatically. I never open attachments, even if I know who sent them, since often the sender isn't aware they can be transmitting a virus. Norton Internet Security contains anti-virus protection, establishes a firewall against intruders, and notifies the user when any program on the machine is attempting to access the Internet without a direct command. This can be overridden for approved programs.
Firewalls can be software only or a combination with hardware.
You can download a free program that helps you write poetry in the styles of 50 poets. Coming soon is a cyber-painting program. A search on Norman Rockwell came up with 371 paintings, all under copyright protection. Extravagant, but c'est la vie. Other choices available.