What to do with USB disk missing drive

1, the boot press F8 into Safe mode after the exit, select Restart or shutdown in the boot, you can enter the normal mode (repair the registry).

2, if the failure is still, please use the system with the System Restore, restore to you did not appear this time of failure repair (if normal mode recovery failure, please turn on the F8 into Safe mode to use System Restore).

3, if the failure is still, set the optical drive in the BIOS for the first boot device Insert system installation disk press R to select "Repair Installation" can be.

4, if the failure is still, using system disk repair, open a command prompt input Sfc/scannow return (SFC and/between a space), insert the original system disk repair system, the system will be automatically compared to repair.

5, if the failure is still, it is recommended to reload the operating system.