你注册表中的内容没有删除
[HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run]
<mogc1y><rundll32 "C:\WINDOWS\Downlo~1\mogc1y.dll",Run> [N/A]
用System Repair Engineer,删除注册表中的DD
操作方法见http://forum.ikaka.com/topic.asp?board=28&artid=8270267&page=1