how to reboot ma toshiba laptop?

0738926513

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Oct 8, 2014
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hi..in last week my Toshiba C50-B0488 changed the windows theme to black due to unactivated software I then requested to activated those software. Before I even reached the the actvation process the p.c said I must reboot.knw all I can see Is a black screen written reboot or select a boot media and press a key I have no idea on where to start please help
 
Solution
Try booting into safe mode by pressing the F8 key during boot up.

If not, try booting from an install or recovery disk to attempt a repair.