how do i update my iphone 4 to the 7.1 update from my laptop?

First read about backup http://support.apple.com/kb/ht1766

Then read on how to transfer photos to your computerhttp://support.apple.com/kb/ts3195

Then

UPDATING iOS

Over the air updating of iOS needs iOS 5 or later so unless you have iOS 5 or later you will not see updating in setting

The following link explains how to update http://support.apple.com/kb/HT4972

This link explains how to update using wireless http://support.apple.com/kb/HT4623

This explains how to transfer purchases to your computer http://support.apple.com/kb/ht1848

Hi Emileeaileen,

See the part in this support article under "Update your device using iTunes":

http://support.apple.com/kb/ht4623

Cheers,

GB