SOLVED at long last. I used the Uninstall Win 7 application and removed every single file that had HP at the start of it Then, went to the HP site and put in HP Photosmart 7520 all in one printed, you can then scroll through the options to download the FULL set of drivers, ignoring the "basic" option. Once I had done this I had the printed shown as networked and with full functionallity to print, scan etc. Do not use the HP discs, just the web download. I now have this full function on both Win 7 PC and Win 8 laptop.
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