USB Port Problems

All of my USB ports (front and back) stopped working on my HP desktop running Vista 32. I have a problem shown in my device manager under USB controllers:

ATI I/O Communications Processor USB 1.0 OHCI Controller
ATI I/O Communications Processor USB 1.1 OHCI Controller
ATI I/O Communications Processor USB 2.0 ECHI Controller

"Windows cannot load the device driver for this hardware. The driver may be corrupted or missing. (Code 39)"

I tried the following procedure that was previously posted by bigbear, but it was unsuccessful in my case:

"Try this registry fix for missing usb ports.
Create a file with NOTEPAD containing the following lines and save it as FIX.REG
-------------------------- Use text after this line --------------------------------
REGEDIT4

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Environment]

"DEVMGR_SHOW_NONPRESENT_DEVICES"="1"
-------------------------- Use text before this line --------------------------------

Double click on FIX.REG and say yes to the Merge Into Registry question.

Unplug ALL USB devices.
Open Device Manager.
View, Show Hidden Devices.
Uninstall all devices under USB Controllers.
Uninstall all devices under Disk Drives that you know are not present.
Uninstall all devices under Storage Volumes. Say no to any reboot prompts until you are finished. Also, if a Storage Volume doesn't uninstall, ignore it and move to the next one.
If you have a yellow ? with unknown devices, uninstall all of the entries there as well.

When this is done, reboot TWICE.

Reconnect the USB devices and see if they're recognized properly."

Again, this did not work for me. Under Portable Devices, I have many USB devices shown, but no errors. I am going to try and uninstall all of these as well and see if this might help.

Because of this problem, I had to stop using my bluetooth keyboard and mouse and switched to a PS2 type. Also, my printer can only be used via the network.

Any other ideas to get the USB ports running again?

 

I also tried uninstalling my portable devices in the device manager, but this didn't work either.

Any suggestions to help get my USB ports working again?

Thanks.