Solve windows 8 restart problem

Windows 8 have a problem of restarting , this problem is so bad to any user .
for example, when you download a large file the pc will restart and cut the download session ,so
directly , here's the solution steps :
1- open ( power options ) by typing "power" in the search of settings . or,If you are on Desktop, move your cursor to top-right corner of screen to access new Charms Bar. Now click on Search option and type power in search box.

 2-

3- in the bottom of the new screen you will find (Enable hybrid boot ) or ( Tern on fast-startup ) > un mark it .


if you didn't find it press on (change settings that are currently unavailable ) and it will appear .


Save changes ,,
no more restart