Issues re-installing iTunes after a hard drive swap

I upgraded my PC and installed a SSD hard drive keeping my original hard drive as an additional drive. my SSD drive became the C Drive, whilst my additional drive became the G drive. I needed to replace my old original drive due to a mechanical fault a short while later, however the replacement drive remained the G drive and had the stored content transferred onto it. Through my upgrading process I upgraded from Win 8.1 (64-bit) to Win 10 (64-bit), iTunes worked with no issue until the replacement of my original hard drive to the new one.

I attempted to uninstall iTunes in order to reinstall it, however due to the directory path having changed an auto uninstall was not possible. I attempted to manually uninstall iTunes and all associated apple products in order to reinstall them. I was unsuccessful, in that when I found a guide on how to do it, I had deleted the required folders in the incorrect order.

I am desperate to reinstall iTunes so that I can once again enjoy my music and transfer content to my iPad and iPod, I seem to be left with an Apple Software Update, Apple Application Support (32 & 64 bit) applications along with the bonjour application. If I try uninstall them it says it cannot find the directory path, I then need to manually attempt to delete the folders, however, it mentions the folder is being used by another program at that time. If I stop the Bonjour process it does not seem to help at all.

PLEASE PLEASE could someone a bit brighter than I am try assist me and my PC illiterate mind!

Many thanks for the assistance!