I have a DELL Dimension desktop computer running windows XP. The annoying problem I have is that if I try plugging in any external device like a memory stick/ flash drive to any of the spare USB ports, windows does not detect the device. It does not register in My computer window or found using windows explorer, and there are no error messages.
However if I now restart the computer with the memory sticks or external devices already plugged into the USB ports there is no problem, and all items are picked up by windows and given a drive reference. (drive F, H, I etc). So long as I do not switch the computer off I can unplug and reinsert the item and still gain access. All that happens is a red question mark appears against the drive icon in My computer window when the device is removed and I go back into My computer The red question mark disappears as soon as I plug the device back into the USB port and again open My computer window.
There does not appear to be any problems with the USB controllers and associated host controllers or root hubs, all return message The device is working correctly, leaving me to think something may have accidentally been switched off by me or during one of the many automatic windows updates from Microsoft, preventing scanning of the USB ports for new devices after the computer has booted up. Can anyone help me resolve this annoying problem?