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Win7 Ultimate system when booting ESC can not find the u disk solution

  

Cause analysis:
Booting ESC can not find the U disk because the Legacy USB Support in the BIOS settings is turned off, turn it on It is.
1, first press the F2 into the BIOS when booting win7, to Advanced——USB Configuration——Legacy USB Support;
2, then change the value to enable, F10 save and exit, so you can It is.
ps:Legacy USB Support: This option means to support USB devices in the traditional operating environment. If it is in the Disable state, it will not be able to recognize U disk, USB interface keyboard and other devices without entering the system.

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