http://support1.lenovo.com.cn/lenovo/wsi/Modules/DriverByType.aspx?OneCome=&SearchType=1&LogicType=1&MachineId=-6692&IsSeachOne=true&IsBackPage=false&ptype=1&typename=%E6%89%AC%E5%A4%A9M4600N&from=select&ptid=7234
有啊，帮你找到啦
http://driverdl.lenovo.com.cn/lenovo/DriverFilesUploadFloder/11786/SOUND_RTL_WINXP_5599_1053.exe
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