USB driver for Samsung Galaxy S Duos 2 I'm looking for a USB driver for my phone Samsung GT-S7582 S Duos 2. Can't find it in Samsung Official Site. Someone please help me.
Install  kies in your PC. It will automatically install corresponding USB drivers.

EDIT:
Samsung Kies is a freeware software application used to communicate between Windows or Mac operating systems, and more recently manufactured Samsung mobile phone and tablet computer devices, usually using a USB cable connection (though wireless LAN Kies connectivity is now possible using some devices).  

This software may be used for:


Data backup
Data transfer (between a Windows or Mac PC, and a Samsung mobile device), limited to certain media file formats.  
Multimedia (audio, photos, video, etc.) management, but limited to certain file formats.
Purchase/acquisition of additional or special device features.
Device firmware and operating system (OS version) upgrades.


To work all these, USB driver should be installed. So When you install this software it will automatically detect your device and install USB drivers.