The web is subject to periodic attacks and fixes are freely available on the net.   All the major suppliers of anti-virus software let you download a fix. This enlightened view is based not only on commercial reality, but on the hope that you can be persuaded to buy a full copy. They also recognise the benefit of ‘herd immunity’.  The logic is simple: if no computer transmits the virus (or it could be immunised very quickly), it cannot spread. By making the fixes available they are protecting their wider community of customers.  http://us.mcafee.com/default.asp http://www.pandasoftware.com/download/ http://www.sophos.com/ http://www.symantec.com/