Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Whenever I boot my machine with an external drive plugged into the usb I get an error:

Reboot and Select proper Boot device or Insert Boot Media in selected Boot device and press a key

I've reviewed my boot order, but my bios does not list any USB boot options. How can I stop my motherboard from trying to boot to my external drive?

 MB: P4P800SE w/ AMIBIOS 1005 
 ext. HDD: FreeAgent 750gb
share|improve this question
up vote 0 down vote accepted

After I disabled "Legacy USB Support" in the BIOS, the system skipped USB drive detection and booted normally.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.