USB Device Not Recognized - USB device attached has malfunctioned & Windows does not recognize it

I have an HP Pavilion dv4 Notebook running Windows 7 Home Premium and the USB ports worked fine for an HP deskjet printer and an older Casio digital camera. Then one day, the laptop decided not to recognize the Casio digital camera and gave the error message "USB Device Not Recognized" and also indicated that the device attached to the computer has malfunctioned. This prompted me to buy a new Canon digital camera. Well, a new camera did not fix the problem. Now, anything connected to either of the 2 USB ports will not be recognized by my laptop. Help!  I'm at a loss to figure this out.  I've tried the suggested Microsoft help below: 
Suggestion 1: For the issue with USB devices, uninstall and re-install all the USB controllers. This lets the controllers recover the USB port from its unresponsive condition.
The USB controllers represent the USB ports in Device Manager.
a. Click Start, type device manager in the Start search box and hit Enter.
b. Expand Universal Serial Bus controllers.
Note: You might have to scroll down the list to find this item.
c. Right-click the first USB controller under Universal Serial Bus controllers, and then click Uninstall to remove it.
d. Repeat the above step for each USB controller that is listed under Universal Serial Bus controllers.
e. Restart the computer. After the computer starts, Windows will automatically scan for hardware changes and reinstall all the USB controllers that you uninstalled.
f. Check the USB device to see whether it is working.
This did not correct the problem.  Then from device manager, I tried updating drivers on all the USB controllers and root hubs. While some may have received downloaded software updates, it still did not correct the USB device not recognized problem after restarting the computer.  I'm hoping someone knows of the fix to this situation and can pass it along to me. Thanks for reading and posting any help.
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Hey 655micha, 
I'm sorry you're having an issue with a USB device. Do you get an error window that pops up? If so what does it say? Have you checked Device Manager? Is is just one device that isn't working? Has it ever worked before? Is it just one USB port in particular that isn't recognizing devices? 
What model do you have? Here are the steps to find your product number. FN + ESC is the easiest way to find that information. 

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