I need a cable to connect to the computer and the camcorder, to be able to transfer movies to the pc

Maybe something like this?:
Newegg.com - Pinnacle Dazzle Video Creator Plus HD 82303000201 USB 2.0 Interface (http://www.newegg.com/Product/Product.aspx?Item=N82E16815144041)

You can check here:

http://www.sonystyle.com/webapp/wcs/stores/servlet/CategoryDisplay?categoryId=8198552921644518397&N=4294966173&catalogId=10551&storeId=10151&langId=-1&accessory=true


However, to be exact, the model of the camcorder will be helpful. It is likely that all you need is a USB cable with the proper ends. Most modern camcorders will plug straight into the PC via a standard USB cable.