Security problems can be attributed to hardware, software, networks, or some combination of the three. You will resolve some types of security problems more often than others.
Malware Settings
Malware protection problems are often related to incorrect software settings or configurations. As a result of these faulty settings, a computer may display one or more of the symptoms caused by malware and boot sector viruses, as shown in Figure 1.
User Accounts and Permissions
Unauthorized access or blocked access is often caused by incorrect user account settings or incorrect permissions, as shown in Figure 2.
Computer Security
Computer security problems can be caused by incorrect security settings in the BIOS or on the hard drive, as shown in Figure 3.
Firewall and Proxy Settings
Blocked connections to networked resources and the Internet are often related to incorrect firewall and proxy rules, and incorrect port settings, as shown in Figure 4.