I have become very frustrated with this problem. 
Out of the blue my win 7 Ultimate SP1 will not recognize CERTAIN USB devices plugged in the rear ports (I have 2 in the front, 4 in the rear). I get the "device not recognized " pop up.
The strange thing is, all the the devices that I plug into the front 2 USB ports are recognized and work. I know the rear ports are functioning because when i plug in my scanner, or my flash drive, they work. However when i plug in my HP printer or my logitech mouse (which both work in the front ports), it says they are unrecognized.
I have scoured the forums and have tried numerous things; unplugging power, uninstalling drivers, taking out MB battery, resetting CMOS, etc. All with no luck.
I really cant imagine how my mouse can work in the front usb port but will not work in the rear one, in which my flash drive & USB-powered scanner work.
PLZ HELPPPP

Out of the blue my win 7 Ultimate SP1 will not recognize CERTAIN USB devices plugged in the rear ports (I have 2 in the front, 4 in the rear). I get the "device not recognized " pop up.
The strange thing is, all the the devices that I plug into the front 2 USB ports are recognized and work. I know the rear ports are functioning because when i plug in my scanner, or my flash drive, they work. However when i plug in my HP printer or my logitech mouse (which both work in the front ports), it says they are unrecognized.
I have scoured the forums and have tried numerous things; unplugging power, uninstalling drivers, taking out MB battery, resetting CMOS, etc. All with no luck.
I really cant imagine how my mouse can work in the front usb port but will not work in the rear one, in which my flash drive & USB-powered scanner work.
PLZ HELPPPP
My Computer
- Computer Manufacturer/Model Number
- HP m9000t
- OS
- Windows 7 Ultimate 32bit
- CPU
- E6750
- Motherboard
- ASUS IPB-LA "Berkley"
- Memory
- 2 GB
- Graphics Card(s)
- Nvidia (Galaxy) 8400GS 512mb
- Sound Card
- Realtek
- PSU
- ANtec EarthWatts 500