The worm Conficker also affects the next Windows operating system according to an article that was posted today at The Register.
It attempts to spread on a network and it also affects removable drives using a file called autorun.inf.
The trick that the worm uses is that it shows up as folder but if a user clicks on it, the file will actually run the worm’s viral payload.
The author notes that there may still be time to modify the AutoPlay functionality in Windows 7 to stop this kind of attacks.
Source: The Register

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Lee
Its funny, I have been running a Macbook with no virus protection or malware protection of any kind for 8 months and its 100% clean. Downloaded and installed an anti-malware program the other day to check.
Windows 7 is still in beta and already falls victim to exploits. I think that says something.
Gunslinger. What a jerk. Keep opening your big mouth and daring these people and let’s see what happens. Apple, on the average, has had more security updates than windows. I’m not a fanboi, but these are machines. Tools. Components. OK? Not a religion. Conficker is mainly geared towards large networks and servers. Most home users have nothing to worry about if the stay updated. Perhaps the reason they don’t bother with “Macs” is they are not worth bothering with. What does that tell you??
There are only a few viruses that affect mac only because they are targeted towards windows, not because Macs are better. As Macs gain more popularity, virus makers will start producing Mac viruses. Please do you studies before saying things.