A Colleague of Yours Recently Had His Computer Hacked

Multiple Choice

A colleague of yours recently had his computer hacked. He is trying to secure it from future attacks and tells you he has a strong password on the administrator account, with an active firewall that is well configured, and an antivirus program. Which of the following may he have forgotten?

A) Disabling the guest account.
B) Changing the default email ports.
C) Setting Windows Updates to not occur automatically.
D) Writing his password in a safe place.