What do I do if USB ports don't recognize devices?

Computer issue - None of the drivers are recognized?

• I recently received my dad's old iPhone, and ever since trouble began: I installed and due to an error I later uninstalled iTunes. This started the problem, but I'm not sure why. So I reinstalled iTunes and restarted my PC. Bang! PC won't recognize my audio devices, my usb ports, my ethernet connections, not even adapters like Hamachi and Tunngle. This is really really weird. I looked into device manager and found that it tells me that "The driver was not found or is corrupted (Code 39)" when I look into the driver's status. It was working fine before hand, and all I changed was install and uninstall iTunes. Any ideas?

• Answer:

  those devices are using the same IRQ, try to uninstall and install all the devices' drivers again...If your computer can't read your flash drive try to plug-in your memory stick while the computer reboots...burn the devices' drivers on a CD instead and through there, install it...