Driver Page - Select your operating system HP Pavilion dv9443ca Notebook PC - HP Customer Care (Australia - English)
Would check here to see you have the latest nforce chipset drivers - Drivers - Download NVIDIA Drivers
if you do have them try reinstalling them.
Would check your usb settings in the bios.
Possible fix - set up a restore point and restore if it doesnt work - you need at least 4gb of memory installed in your system otherwise dont try it, you also so need the NVIDIA USB EHCI chipset - it can effect other USB devices other than storage devices: You encounter problems when you move data over USB from a Windows 7 or Windows Server 2008 R2-based computer that has an NVIDIA USB EHCI chipset and at least 4GB of RAM
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