Does it blue screen or does it just restart? Does it get to the Windows loading logo or does it reboot before that? When it reboots does it actually reboot or does it turn off completely?
After the Toshiba logo flashes, start pressing F8 to load up the Windows Advanced Boot menu and try Safe Mode. If that doesn't work, try selecting the "Disable Restart on System Failure" and see if it gives a BSOD.
Laptop: MSI GT70 2OC-059us | i7-4700MQ | 16GB | GTX 770m | 500GB SSD / 750GB HDD | 17.3" | Win10 Pro
Desktop: 4690k | 12GB g.Skill RipJaws | GTX 970 | 520hx | Z87X-UD4H | Corsair Vengeance C70 | Corsair H110 | Acer 25" | Acer 22" | Win10
Mobile: Samsung Galaxy Note 5
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