i still can't connect gt-s5360 Samsung phone to windows 7 PC
Depending on the model of your phone, you may not be able to get the "Connect to PC" dialog. This is normal behavior. 

Troubleshoot:


Since you can connect another phone to your PC, you probably have the
correct drivers (since Samsung uses a universal USB driver which you
can download here), but I would try to install it just in
case (it doesn't hurt to try).
Try disabling USB Debugging under Settings > Developer Settings.
Try enabling Settings > Wireless and Network > USB Settings > Ask on connection.