Autorun is the most widely used way by malicious items to spread in a Windows system. Many virus create autorun.inf file in removable media to spread in your system.
Windows 7 comes autorun disabled for removable media by default. Autorun is only enabled for CD/DVD drives in Windows 7.

The same behavior was applied in Windows 2000, XP, Vista, Server 2003 and 2008 by an update "KB971029" which was released by Microsoft in 2009.
Now Microsoft has released this update via Windows Updates so that more people can know about this update and install it in their systems.
You can install it via Windows Updates. Its an optional update btw.
This article was posted by VG in following section: Windows Vista, Windows XP.
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wildgoosespeeder
I did notice something wrong when installing games or programs by disc. Well good thing I am technology-savy and know how to start it manually.
Mark Anthony
ahhh , that's why my flash drive got autorun.inf ..
my old lappy windows xp is not genuine XD... but my pc do..
D. Nevarez
:(
that means I can't install my games on my work computer! Not good. I love games, got nothing else to do at work
Arvin V. Malabanan
Thanks for the info VG. Telling us that it is an optional update helps because we can update it manually as soon as possible :D
Jozen
is it possible get the "Pin To Taskbar" feature in windows xp?
sorry for the off-topicness...
VG
^^ You can try following:
http://www.askvg.com/viglance-get-windows-7-look-like-superbar-in-windows-xp/
http://www.askvg.com/sbar-windows-7-taskbar-clone-for-windows-xp-and-vista/
Rtyh-12
To D. Nevarez: you can open the installation CD/DVD and double-click setup.exe (in most, if not all cases).