1, after booting the display screen missing operating system;
2, check whether the computer's USB interface is inserted with mobile devices: U disk, mobile hard disk, etc. Check if there is a disc in the CD-ROM drive.
3. Remove the USB flash drive and CD-ROM and restart the computer. Can be forced to shut down, that is, after pressing the start button for a few seconds, the computer will automatically shut down, pause for a while, boot;
4, usually U disk, mobile hard disk, CD, etc., take out in time to prevent similar situations occur.
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