It looks like the drive sector is 512 and is supported by win7 with SP1-so I dont think that is causing the issue.. One thing that caught my eye in the bios was UEFI mode and secure boot. I'm not really sure what this is all about-but thought it may be worth trying--however-I dont want to get...
Machine: Dell laptop -Latitude E7240 Ultrabook External Drive: 3 TB MyBook -- P/N WDBFJK0030HBK-04 when drive is plugged into port replicator-or laptop directly-- the machine will not boot to windows. if the drive is unplugged, the machine will then boot-afterwhich, the drive can be plugged in...