External HDD and boot up problems

[CPU-Zebra]

I have an 80gb USB 2.0 external HDD made by Freecom. I have had it since I built my computer in March. Now when my brother tried using his 80gb external HDD (same version as mine) his computer wouldn't boot with it plugged in and he had to plug in after loading up. Mine would boot up fine with it plugged in. I have recently began overclocking my CPU and now when I went to boot up this morning it would post but then wouldn't begin loading windows. I set my CPU and RAM back to stock, and it didn't boot, so then I unplugged my external HDD and it has booted. What is causing it to do this? Have I accidently changed something in the BIOS and it has affected the boot priority (if you can set USBs boot priority ) or has my OCing done something? The external HDD only has music on but it would be an annoyance to take it out everytime I want to boot up and then plug it back in if I want to listen to music. Thanks.

 

[TheKnat]

I had this same problem on my parents PC with an Ipod shuffle!

Its most likely to be because of the boot priority. Most modern BIOS's can use a USB device to emulate a floopy device and can therefore boot from them.

If you don't need to boot from floppy at all, either remove it from the boot list or move it to be the bottom priority device.