First of all, thanks for your answer.
I can't check the hard drive activity because there is no led for this. I know it is weird but geniuses in toshiba decided to create performance models this way. But power led is active during this problem, just screen turns black. If I don't push the power button to shut down, it waits almost an hour, sometimes more. But this time, it cause a problem during the opening screen like can't skip from black screen to login screen. You have to push the power button to shut down then you can startup accurately.
It hasn't went straight to my desktop. The only thing happened, I use a program for start menu and thanks to this program it skips the metro screen and shows my desktop. But sometimes it doesn't work and left me in the metro screen. I wonder that could be a problem. Another thing I wonder, why windows can't handle the shutdown proccess? I closed firefox, torrent and outlook manually but it happened again. On the shutdown screen it says there is a program but then it closes on its own.
As I said, I had no such a problem. I updated then shutdown and windows 8 didn't accept this for the upgrade. Then I restart it but this time it stucked for hours. I shut down my laptop by using power button then this problem occured. I'm suspicious about some system settings but I have no idea what they are.