Any computer system these days is vulnerable to online hacking. The only way to keep that from happening is to never connect to the Internet. But the Internet is such a wonderful source of information, it just can’t be done. However, there are some things that you can do to keep the Church computers secure:

o Use Antivirus software (and keep it up to date)
o Turn off systems when they are not in use
o Avoid downloading anything you have suspicions about

Physical security is probably the best. If the computer is off, then no one can hack into it. However, there is also room for shrewdness (Matthew 10:16). So be on your guard at all times.