not sure about your cause. try these:

Scan for new hardware:
1. Click Start, and then click Run.
2. Type Devmgmt.msc in the Open box, and then click OK.
3. On the Action menu, click Scan for hardware changes. This causes Windows to recognize new devices.


Or, disable power management of the USB hub:
1. Click Start, and then click Run.
2. Type devmgmt.msc in the Open box, and then click OK.
3. Expand the Universal Serial Bus controllers node, and then follow these steps for each USB Root Hub that is listed: a. Right-click the USB Root Hub, and then click Properties.
b. Click the Power Management tab.
c. Click to clear the Allow the computer to turn off this device to save power check box, and then click OK.

所有跟帖： 

• 也可以手动安装sanner和camera试试 -充数- ♀ (71 bytes) () 06/09/2006 postreply 13:46:09