http://www.ghacks.net/2017/02/11/blo...ows-7-and-8-1/
And for those still not knowing it, Microsoft since longer time has injected snooping software from Win10 into W7 and W8, calling it anything but that, of course. The above list should help you to identify especially critical items which can be easily deleted in the usual way.
On a sidenote, the famous KB 2952664 has recently been pushed onto Win7 machines once again - for the tenthousandth time, it seems. They really want you to swallow this pill.
http://borncity.com/win/2017/02/11/w...8-re-released/
Say what you want, Microsoft cannot be accused of running short on persistence.