很久以前有人讨论过。我的电脑上面也一直是这样。前几天在网上偶然发现了解决办法：
1. Click Start -> Run
2. Execute regedit
3. Navigate to
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\nvata
4. Click Edit
5. Select New > DWORD value
6. Name this DWORD: DisableRemovable
7. Double click this new DWORD and set its value to one (1).
8. Close Regedit and reboot