进入控制面版的添加删除程序中卸载Winstdup
关闭所有浏览窗口以及一些不必要的程序
运行Hijackthis，扫描结束后在下列选项前打上勾，然后选"修复""（如果有的话
O2 - BHO: stdup - {6A512BF7-EC78-4e8d-9841-6C02E8FA9838} - C:\WINDOWS\SYSTEM32\stdup.dll
O4 - 启动项HKLM\\Run: [YDTMain.exe] rem C:\PROGRA~1\YDT\YDTMain.exe
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Restrictions present
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel present
O6 - HKLM\Software\Policies\Microsoft\Internet Explorer\Restrictions present
重启删除
C:\PROGRA~1\YDT
C:\WINDOWS\SYSTEM32\stdup.dll
