If you don't want to go Windows 8, you lack TPM (though I assume you have it since they asked you to enable bitlocker), or BIOS instead of UEFI there are a number of software products that can manage SED drives in place of Bitlocker.
If you don't want to go Windows 8, you lack TPM (though I assume you have it since they asked you to enable bitlocker), or BIOS instead of UEFI there are a number of software products that can manage SED drives in place of Bitlocker.