Solution:
1. Long press and short press:
a. Press and hold the power button for about 20 seconds to force shutdown.
b. Press the power button to turn it on normally. When the surface appears, press and hold the power button to force shutdown.
c. Press the power button again to boot normally. When the surface appears, press and hold the power button to force shutdown. Stop the operation when the message "Please wait, preparing for automatic repair" appears about three times.
d. Some options will appear, select "Advanced Options" (remember that initialization of backup data will delete all data).
e. Click "Troubleshoot" and then click "Reset this PC."
f. Initialization is completed and the computer is configured.
2. U disk image, visit this address: https://answers.microsoft.com/zh-hans/surface/forum/surfpronew -surfupdate/Device cannot be started/74435ecd-6c5d-4b31-8562-abecf76a51da?tm=1509516111875
3. Before U disk image, you can try to back up data through the following steps: Long press and short press - Repair - After the repair fails, a page to select an option will appear - Troubleshooting - Advanced options - Command prompt - If Bitlocker appears and you need to retrieve the key - Enter the key - ( If there are multiple accounts in your device, please select the account you need to log in) - enter notepad - open notepad, there is a file in the upper left corner - click open - you can see this computer - then select the one you need Just back up the data.
If the above solution does not work, it may be that your Surface has some hardware problems.
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