Robots are roaming the Internet 24/7 looking for opportunities to take advantage of your computers and phones. Relying on virus programs to protect your computer is wishful thinking. You should turn off your computers and phones at night
Electricity is your number one enemy with any electronics. Especially if you are using database programs for your business. There are two things you can do to protect against electricity.
You should have a dedicated line for your main electronics. Especially if you have a main computer that provides database access on a network.
You should use a battary backup on each computer in your office. Also be sure to plug your router and modem into it.