USB disk can't show the solution

U disk can not show the solution computer has identified the U disk, but open "My Computer" but can not see the corresponding letter. Go to Disk Management in Administrative Tools (enter Diskmgmt.msc in run), and you can see the disk without assigning a letter. Manually assign a disk letter G, but open "My Computer", still does not appear the U disk letter. In the Address bar, enter G: Prompts that the file://g:/file cannot be found. If you format the USB drive on disk Management, the hint cannot be formatted and the volume is not enabled. If the right key in Disk Management is just assigned to the G disk, select Resource management, the hint can not find G:. But under the Windows Console (Command prompt, enter cmd in "Run") can enter the U disk, can operate normally (copy, delete, open file).

　　Other Solutions

To the system directory c:windowssystem32drivers see if there is a "sptd.sys" file. Remove it and reboot. Problem solved! Note: This "Sptd.sys" is not from Microsoft Windows.

　　Other possible causes:

1, the system has mapped network drive, resulting in the letter can not be assigned to U disk.

WORKAROUND: Disconnect the mapped network drive.

2, the letter is hidden.

Workaround: Enter the registry (Regedit.exe) and enter the "Heky-current-usersoftwaremicrosoftwindowscurrentversionpoliciesexplorer" branch. Locate the key value "NOdrives" that exists for the path and delete it. Log off and log back in. (Not the NoDriveTypeAutoRun key value).

3, U disk problem.

Solution: Reformat the U disk. The best low-level format, to the Internet to find a U disk tool.

4, not really, that's the last resort: Re-clean installation of Windows xp!