Note:The tutorial is for Samsung galaxy S3 but the driver setup will work for all Galaxy S series i.e. S1, S2, S3, S4, S5
Supported OS: Windows XP/ Vista/ Windows 7/ 8/ 8.1
Verify: To check if Driver is actually installed or not,There will be a folder created as or something like this C:/Program Files/SAMSUNG/USB Drivers

Download Link: http://samsung-usbdriver.blogspot.in

Instructions:
Step 1: Uninstall any previous version of Samsung Usb driver for mobile phones.(Highly Recommended)
Step 2: Download the driver file from the links in the description.
Step 3: After successfully downloading, Unzip the file and double click the .exe file.
Step 4: Just press Yes and install just like any other software.It will take some time depending upon your computer speed.
Final Step: After installing, restart your PC and then connect your Samsung Device using USB cable.
Now you can transfer data Enjoy!!!

Download Link: http://samsung-usbdriver.blogspot.in