| posts: 822 | Location: Moscow, Russia
- screen not updated due to some bug
- circle not updated due to overwhelmed CPU
For errors look in the Event Viewer.
For startup programs, drivers and services look in the Autoruns.exe (from Sysinternals). There you can turn off some autostarted items and see if circle returns to normal.
Edit: Knowing how many actions Windows performs during startup it`s strange that animation is possible at all.