The driver for my HP 1018 has become corrupted and I tried to reinstall it. However, when I tried to uninstall the existing driver via the HP Print and Scan Doctor it informed me that I must uninstall it via the Windows Control Panel, as its uninstaller component is not present. However, there is no mention of the HP program on the Control Panel. I tried using the Microsoft Fixit program, but as HP was not listed it asked me to insert the Product Code. Where can I find that? Are there any other steps I can take? My computer uses Windows 7, 64 bit.