as a simplification of the link above
First download samsung pc studio(again) from link above then right click your samsung pc studio .exe and click properties then go to compatability and select compatability mode: Select Windows Xp sp3.
Once you ar able to install the pc studio
Go to your windows 7 device manager
Click start >right click my computer>manage>click device manager then plug your samsung phone in look for unidentified device or something like that (Represented by an Exclamation mark !) right click on your phone model in device manager and click update device driver.Once updated your system should be all go .Hope i have helped you.
I will try to help you to the best that i can. If you liked my reply.Please rate as helpful -Nicholas Digital Labs Admin