Microsoft Security Essentials
Microsoft has released a new product call Microsoft Security Essentials. It is a free product that protects your pc from viruses, spyware and other malware. It is not intended to replace your current McAfee AV in schools but if you are thinking about buying a new laptop for example, you may want to thank "Popular High Street Retailer" for their kind offer of "A Virus Product for £29.99 a year" and think about installing MSE :)
http://www.microsoft.com/security_essentials/