So make sure your security's up to date!
http://nakedsecurity.sophos.com/201...um=status+message&utm_campaign=naked+security
Listen up, this one is serious.
There is a critical vulnerability in many versions of Windows, which could be exploited to spread a worm automatically between vulnerable computers.
http://nakedsecurity.sophos.com/201...um=status+message&utm_campaign=naked+security