光碟機裝置上出現驚嘆號(Code 41)

最近突然DVD光碟機的裝置上出現了驚嘆號，而不能使用。

Windows successfully loaded the device driver for this hardware but cannot find the hardware device. (Code 41)

查了一下解決方法如下：

先從裝置管理員中移除有問題的光碟機。然後...

Start Registry Editor

開始 > 執行 > regedit.exe or regedit32.exe

Locate the UpperFilters value under the following key in the registry:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}

On the Edit menu, click Delete, and then click OK.

找到UpperFilters機碼並刪除之

Locate the LowerFilters value under the same key in the registry:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}
On the Edit menu, click Delete, and then click OK.

找到LowerFilters機碼並刪除之

然後再重新開機就會重新抓到正確的光碟機設定值，神奇八？