Control Panel -> Programs and Features -> View Installed Updates
3035583 - 'nagware' telemtry re: upgrading to Win10
2952664 - 'nagware' -- scheduled task that a) scans your applications for Win10 compatibility without your permission, b) does so without checking whether the host machine will support Win10 and c) tries to melt your CPU in the process.
2990214 - 'technical preview' (nagware)
3021917 - may crash
3068708 - just like E.T. this one phones home with 'telemetry'.