Keeps crashing - Default Boot Device Missing or Boot Failed
I have a year and half old Lenovo Yoga Pro 3 and it started crashing a month or so ago. Sometimes I could reboot and then use it for a while, only to crash a bit later. Lenovo ran a remote diagnostic and no hardware issues were identified. They advised reinstalling Windows, so I backed everything up and did so. Still crashing. Lenovo said bring it to Geek Squad. The Geek guy said it could be a hard drive or motherboard issue and to bring it in for a more thorough diagnostic. Any ideas?