Elliot updated to Windows 10 and now he gets a blue screen. Leo says that can happen when using the Windows Insider version and installing an update. It could be due to using Beta versions. Leo advises going into the recovery mode and rolling back. He can press F8 when booting up to do that. Then he can try to apply the update again. Windows 10 has an excellent recovery utility. If it's a hard drive error, however, he may have to start over and replace the drive.