Satelite C660 refuses to shut down

Hi all,
hope someone can help, my laptop is refusing to shut down and I've no idea why.
Anyone have any suggestions?
Thanks

On this virtual way it is not easy to say why this happen but probably OS is blocked somehow.
What happen when you press shutdown button?
Maybe by some running process in the background.
Before you use option for shut down, stop some running software that you can find in notification area (notification icons).
If this will not help restart your notebook, do the same again and open task manager. Check if some of running processes has extremely high amount on memory. If yes stop it and try again.
Maybe playing a bit with background processes you will find out what is wrong there.

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