Use Device Manager to scan for hardware changes. After your computer scans for hardware changes, it might recognize the USB device that is connected to the USB port so that you can use the device. To scan for hardware changes, follow these steps: (1) Click Start, and then click Run. Note If you are running Windows Vista, click Start, and then use the Start Search box. (1) Type devmgmt.msc, and then click OK. Device Manager opens. (2) In Device Manager, click your computer so that it is highlighted. (3) Click Action, and then click Scan for hardware changes. (4) Check the USB device to see whether it is working. 2- To disable and re-enable the USB controllers, follow these steps: (1) Click Start, and then click Run. Note If you are running Windows Vista, click Start, and then use the Start Search box. (1) Type devmgmt.msc, and then click OK. Device Manager opens. (2) Expand Universal Serial Bus controllers. Note You might have to scroll down the list to find this item. (1) Right-click the first USB...