Drive not recognized under Vista Home Premium 64-bit

<a href="/ftp://ftp.hp.com/pub/softlib/software12/COL34826/oj-90928-1/HPSDU.exe">HP Scan Diagnostic Utility</a> was created to help users troubleshoot and correct connectivity problems with HP All-in-One devices and software on Windows-based computers. Follow the on-screen instructions to run the utility.<br /><br style="font-style: italic;" /><span style="font-style: italic;">This utility is compatible with Microsoft Windows Vista, Microsoft Windows Vista Home Premium (32-bit), Microsoft Windows Vista Home Basic (32-bit), Microsoft Windows Vista Business (32-bit), Microsoft Windows Vista Ultimate (32-bit), Microsoft Windows Vista (64-bit), Microsoft Windows Vista Home Basic (64-bit), Microsoft Windows Vista Home Premium (64-bit), Microsoft Windows Vista Business (64-bit), Microsoft Windows Vista Ultimate (64-bit), Microsoft Windows Vista Enterprise (64-bit), Microsoft Windows Vista Enterprise (32-bit), Microsoft Windows XP</span><br /><br />You could also try running the HP System Check if you have <a href="http://h50203.www5.hp.com/HPISWeb/customer/SupportProds.aspx?region=NA">any of these supported products</a>. HP System Check automates and speeds the resolution of computing problems, acting as a Web-based diagnosis and resolution service. System Check offers a unique combination of Web based trouble-shooting software and world-class hardware diagnostics, providing the most comprehensive array of online support solutions in the industry. Check your system by <a href="http://h20239.www2.hp.com/techcenter/HP_SystemCheck/hp_syscheck.htm">clicking here</a>.