The Tip of the Night for January 4, 2016 noted that you need a PC with the TPM (Trusted Platform Module) chip in order to access a Bitlocker encrypted drive. There is actually a way around this limitation.
Click on your start button, enter 'run', and then enter gpedit.msc to open the Group Policy Editor.
You then browse to ocal Computer Policy > Computer Configuration > Administrative Templates > Windows Components > BitLocker Drive Encryption > Operating System Drives, then click 'Require additional authentication at startup'.
Choose the enabled radial button, and then check off the box that allows Bitlocker without TPM chip.
See this post by Chris Hoffman.