Do the chat support thing and if they can't resolve it in the time period that you have return rights, just return the product.
I've just installed a HP Officejet 6500A printer to a USB connection to my HP 6730b laptop running Windows7 32 bit.
As soon as the installation software started I seemed to have lost connection to my USB mouse and keyboard.
I've gone in to Control panel and the keyboard appears under the hardware tab as working properly. The mouse is gone and only the synaptics touchpad shows.
Where do I go to start solving this??