My Toshiba a300 can't boot in Windows Vista. A while after pressing power button it shows the "Windows Error Recovery" screen. At this phase i couldn't use the arrows. For this reason I've connected an external keyboard. I tried both of the choices but i have always the same result: It stucks at the Windows loading screen and after few seconds it shuts down suddenly and starts again doing the same thing over and over again. I tried to boot in safe mode but it stucks again. Then I decided to format it. I used a bootable usb with Windows 10. I choosed from BIOS settings to boot from USB. Unfortunately this didn't solve the problem. This time it shows the windows 10 loading screen and it stucks again. Do you have any suggestions to solve this problem?