Whenever an external device is plugged in Windows it showed an Autorun options for choosing what happens when you insert it.
It can be configured at Control Panel > Autoplay
In order to help prevent malware from spreading using the Autorun mechanism, the Windows 7 engineering team made two important changes to the product:
Windows 7: Tips & Tricks
63 | P a g e
1. AutoPlay will no longer support the Autorun functionality for non-optical removable media. In other words, AutoPlay will still work for CD/DVDs but it will no longer work for USB drives.
Before the change (left) after the change (right)
2. A dialog change was...
