What if the USB device fails under Windows XP?

Q: The operating system I installed is Windows XP. The computer has 4 USB ports, but In use, USB devices such as USB mice and USB keyboards often fail. In this case, if you restart the computer or change a USB interface, it will return to normal. Why is this? How to solve it?
A: Today's computers generally have 4 to 8 USB ports, but some computers with Windows XP will have unstable USB interface, typically like a USB mouse. The USB keyboard will be inexplicable. In fact, this is because Windows XP has enabled the USB power saving mode by default, which causes some USB interfaces to be insufficiently powered, causing the USB devices to intermittently fail. As long as the USB power save mode is turned off, the latest xp system downloads the USB device and it can be restored. Right-click "My Computer" and select "Properties" to open the "System Properties" dialog box, switch to the "Hardware" tab, open the "Device Manager", double-click "General" string Row bus controllers, you will see several "USB Root Hub", double-click any one, open the "USB Root Hub Properties" dialog box, switch to the "Power Management" tab, remove “ Allow the computer to turn off this device to save power. Check the box before clicking “OK” to return, and then restart the computer after modifying the properties of each USB Root Hub. The USB device can resume stable operation.