Please boot in safe mode and see if the problem persist.
If the problem does not persist, please do the following:
open taskmanager and disable everything in the startup tab
open msconfig > search msconfig and open it
go to the tab services
check 'hide microsoft services'
uncheck every other services
click appy and click ok
reboot if asked.
If the problem does not persist, enable at taskmanager 1 startup item and msconfig 1 service, reboot and see if the problem is there.
If the problem is still not there, enable another startup item and service and see if the problem is there.
Keep going until you have found the problem or there is nothing left to enable.