直接卸载2.0. 去官方http://www.microsoft.com/downloads/details.aspx?displaylang=zh-cn&FamilyID=333325fd-ae52-4e35-b531-508d977d32a6 (2.7M) 或http://www.microsoft.com/downloads/details.aspx?familyid=D0E5DEA7-AC26-4AD7-B68C-FE5076BBA986&displaylang=zh-cn 完整安装包(231.5 M)