Why isn't my laptop not recognizing my iPhone 4S?

This has been happening every time I try to plug my phone into my laptop. Does this happen to you, and what do you do? What should I do? Last time I plugged it in, it worked perfectly. Now it won't recognize it. What can I do about it?

Does the 4S recognise the fact tat it is connected to it? Is it charging, if not it is probably the cable, replace it, they are really cheap. If it is charging, try and use something else with the usb port and see if it works. Obviously if it doesn't, it could be damaged.

Could be the usb cable

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