After install my mouse pointer has a spinning ring like working in background, is this a bug or is there a way to turn this off?
I've never seen this reported by anyone on here, but the only thing I can think of is restarting the computer (especially if you haven't yet since installing it).
If you can run Task Manager, see if there is any other process using CPU while f.lux is running.
No and it starts immediately when install is finished. It even happens if I exit the application, I have to uninstall and reboot for it to stop. I guess it could be video driver but as it is corporate driven, I can't update this.