If you encounter USB flash drive problems, common causes and solutions are listed in the following table.
USB flash drive is not seen as a drive letter in Windows.
| Cause | Solution | |
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| The drive letter after the last physical drive is not available. | Change the default drive letter for the flash drive in Windows. | |
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| USB flash drive not found (identified). |
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| Cause | Solution | |
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| The device is attached to a USB port that has been disabled in | Run the Computer Setup utility and ensure that the USB ports | |
| Computer Setup. | are enabled. | |
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| The device was not properly seated before | Ensure the device is fully inserted into the USB port before | |
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| applying power to the system | |
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| System will not boot from USB flash drive. |
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| Cause | Solution | |
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| Boot order is not correct. | Run the Computer Setup utility and change boot sequence. | |
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| The image on the device is not bootable. | Insert a bootable device. | |
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| The computer boots to DOS after making a bootable flash drive. |
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| Cause | Solution | |
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| Flash drive is bootable. | Install the flash drive only after the operating system boots. | |
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