This tablet used to work, but now, when the power button is pressed, this is what appears on the screen (in order): 1. Dell Logo 2. Preparing Automatic Repair 3. Diagnosing Your PC 4. (Automatic Repair page appears) 5. Restart 6. Advanced Options 7. Continue 8. Use A Device 9. Troubleshoot 10. Refresh Your PC 11. Reset Your PC 12. Next 13.Just Remove My Files 14.Fully Clean The Drive Further actions do not result in the appearance of the Windows OS. I have Windows 8.1 on a flash drive but the tablet seems to ignore anything connected to it's usb port, except for the charger. Are there any suggestions?