Comment by fencepost
IIRC the Home editions of Windows now do have drive encryption at least if signed into with a Microsoft account, but they have almost no features for managing that encryption beyond turning it off or getting the recovery key from the MS account.
At the time I was talking about, Bitlocker drive encryption on Windows 7 required either Enterprise or Ultimate, and for a 2-5 person office with no domain and a couple laptops they wanted encrypted outside the office Truecrypt was a perfectly viable option.