I have a Samsung Galaxy Ace and my problem is that I am unable to connect the USB to my PC, without starting Kies software. Is it possible that I can connect my Ace to my Laptop without using Kies, because if I have to connect my mobile to any other PC, that may not contain the Kies?
Disable USB Debugging mode in
Settings -> Development, and try to connect the device. I'm assuming you have installed Samsung Kies, because all device drivers for Samsung devices are present only in that software, and not on the device.