Imaging device not found error

Hello - I have a client that keeps getting this error for her HP AIO, I have tried everything on the HP forums (which is not much) to resolve this. Complete uninstall, latest software re-install, install successful. Printer works fine but as soon as you try the scanner - errors. HP doctor says driver is bad but it is the latest one available. Tried HPScanExt, did not work. Client even bought a new HP AIO, installed fine until scanning - same error. It is Windows 8.1 with latest updates, system scanned for virus and malware - clean. Tried WiFi and USB connections to the printer - same results. Any help would be appreciated!

Hi bdiblik, first you have to uninstall the driver which is you installed recently on your PC. Then restart your PC, go to system manager > check there is all driver missing > go to HP official site & type your model & OS the search box. You'll get all driver from there. Download & install it. I think you will get a good result.

Thanks but I've done that. Used HP Uninstaller and also REVO Uninstaller to remove all HP components before installing the latest HP software. Some suggest that the registry needs to be clean of all HP entries but I am a bit reluctant to mess with the registry unless I have good instructions.