Western Digital Passport Problems

When i turn on my computer and my western digital external passport is connected it doesn’t load windows xp correctly, It stays at the loading screen forever until i unplug the usb cord from my computer and then it loads up and i can login. So my question is what  exactly is the problem that’s causing this because it isn’t a one time thing it’s continuous so i really need a solution.

Another problem i have is when there are files to be backed up, my external just sits there day after day not backing up the files even when the computer is idle and i come back it still has done nothing. So any idea’s what i should do?

Thanks.

Check boot sequence in BIOS. Probably your motherboard is set to start booting from USB disk, then HDD.