Recent statistics show that a large percentage of people believe that cybersecurity is a problem that only affects organizations. Many people believe that, on a personal level, there is little to do with their information, especially because they don't see whether anyone might need their information. In contrast, there is a lot of useful information that a third party can obtain from a personal computer that the user may not even realize (Barrett, 2009). For example, a user might have sensitive information that could reveal secrets about their private life or even crucial financial information. Such information can be used by attackers to monitor your Internet activities, while logged on your computer, whether on a local network or on the Internet. The victim's sensitive information can be shared over the Internet or sold to third parties such as advertisers and criminals, among others (AmeComputers, 2012). Therefore, it is important to take serious security measures to protect your computer from such security issues. This paper, therefore, attempts to justify the need for computer security by investigating potential security risks on a personal computer. 2.0 Potential Security Threats on a Personal Computer Apparently, there are numerous security threats that an individual is exposed to on a personal computer, provided they are connected via a local network or the Internet (Barrett, 2009; Gregg, 2006). This is because information is fundamental; hence, people and organizations are constantly seeking it for both legitimate and illegitimate purposes. It is therefore necessary for an individual to establish a sufficient level of security on their personal computer...... paper medium...... there will be no direct communication between PC programs and the outside world, which will eliminate potential cases of Trojan installation in the system. The firewall is also effective in blocking system hackers; therefore, there will be limited chances of being attacked. Furthermore, McDowell (2006) states that it is essential to have an antivirus program to detect Trojans, which are viruses that bypass the firewall, which also protects against the leakage of secret information such as passwords and credit card numbers. However, it is still highly advisable to use very strong passwords to protect crucial data and keep your software updated by getting the latest patches (McDowell, 2006). In conclusion, it is inevitable to say that security is indispensable in a personal computer as there are various schemes to steal and use personal information for illegitimate purposes.