Bring up task manager
Click app history tab. Identify programs with high CPU utilization times.
Click Startup tab - disable everything on that list.
Reboot
Does it still happen? If yes reenable all you disabled and reboot.
If no, enable one by one (rebooting after every enable) until you find the culprit.
I despise most anti virus programs. I would also try disabling that temporarily. Kill all Trend Micro services by clicking start - typing services.msc - right click all trend micro items and select disable. Reboot.