There are a number of websites out there which provide you with information to help you secure your computer:
The Information Security Awareness Forum is a not-for profit organisation whose members comprise industry and professional bodies with promoting and improving information security awareness at all levels.

Get Safer Online Is a fantastic site that provides security advice on a whole range of issues. From understanding what Anti-Virus software is to safe online dating. The information on the site is provided free of charge, and there is also a test to confirm just how safe you are.

Containts everything you should know about viruses, and Trojans. It will provide detailed reviews about AV products, the latest trends and articles in the fight against the viruses. However, there is a subscription charge to receive the magazine.

One of the best IT security blogs out there. If you want to know what's going on, this should be the first place to start.

An online resource that provides IT professionals in the UK with the most relevant resources on application security, data protection, regulatory compliance, identity and access management, and network security. Benefit from webcasts, white papers, breaking industry news and more, all focused on the issues that matter to you.

Produced by the organisers of Infosecurity Europe. The Infosecurity Adviser is a new community and portal that brings together the information security industry to share views and discuss the latest issues online.

First Base Technologies have provided pragmatic, business-focused, vendor-neutral information security and testing services since 1989. They understand every element of networks - hardware, operating systems, communications and applications.

ASIS Internationa, founded in 1955, is dedicated to increasing the effectiveness and productivity of security professionals by developing educational programs and materials that address broad security interests as well as specific security topics. ASIS also advocates the role and value of the security management profession to business, the media, government entities, and the public.