Boot fail with USB HDD connected

[No-One]

I've recently got a Western Digital USB HDD. When ever I turn my system on with it fails to get through the POST and just gets into a never ending cycle of rebooting halfway through. If I let the system boot into windows and then connect it, it works perfectly. My motherboard is a Gigabyte EP45 DS3.

Has anyone else come across anything like this?

 

[No-One]

No luck. With the hdd connected I can't even get into the bios. it resets before it's even started the memory test

 

[No-One]

Seems to be the easiest way. I only use it about once a week to keep my backups up to date. I did try it on my sisters system (an old AMD 64 rig) and it booted with it connected fine. Don't really think it's worth trying a BIOS flash for such a minor issue