No easy way to do this on your computer. You would have to extract the messages from a backup on your computer (if you have one), which would require 3rd pary software such as iPhone Backup Extractor to do.
I'm looking to try and find my messages hopefully through a backup that is saved to my computer; opposed to going through the person's message and going to the top and clicking load earlier messages.
I'm looking to go quite a few months back through a lengthly conversation and was wondering is there any easy way of accessing those messages through an easy to view way.
Not the most computer savy.. so all the help would be greatly appricated.. and I'm running Windows 7
Welcome to Apple Support Communities,
Let me try to answer this question to the best of my ability. First, you can find the iPhone iTunes back-up file in the following directory on your Windows 7 PC.
That file folder is hidden so you'll have to go to and open the Windows File Explorer and look under the "Tools" header and look for the "Folder Options" (or something similar) button and click it. Once you are there click the view tab you will see a group of options. Look for the "Files and Hidden Folders" header. There you will find an option that says "Show all hidden files and folders". Close the window and then you should be able to reach the folder that contains your iPhone back-up.
However, there is a caveat to this procedure. What you'll get a collection folders with alphanumeric characters, in addition each of these folders will be filled with a large number of archive files each with their own individual alphanumeric filenames. This type of set up makes it extremely difficult to decipher which file is a video and which file is a text message.
Hopefully, you find this information helpful!