【答】with scattered reports that some people’s PCs are automatically upgrading from Windows 7，总体是个介词短语。

with scattered reports 意思是“有一些零散的反馈报案”，that some people’s PCs are automatically upgrading from Windows 7，是reports 的同位语，是其具体内容，作方式状语修饰is raising some eyebrows（让人惊讶，让人侧目）。