Courtesy: Vnunet.com Edited: Kiran Microsoft has stated that Windows Vista's new security features are so strong that antivirus software is no longer necessary. When asked about the security of Vista compared with XP, Microsoft told BetaNews: "Windows XP SP2 did an amazing job, but we learned a lot during Windows XP SP2 and there were things that we couldn't put in that product. Strong feature in Vista is Address Space Layout Randomisation. Each Vista machine is slightly different. So even if there is a remote exploit on one machine, and a worm tries to jump from one machine to another, the probability of that actually succeeding is very small.