Encrypting Windows Hard Drives

Bruce Schneier discusses the 'best of the worse' full-disk encryption tools available. I quote the conclusion below:

Based on what I know about BitLocker, I think it's perfectly fine for average Windows users to rely on, which is especially convenient considering it comes with many PCs. If it ever turns out that Microsoft is willing to include a backdoor in a major feature of Windows, then we have much bigger problems than the choice of disk encryption software anyway.
Whatever you choose, if trusting a proprietary operating system not to be malicious doesn't fit your threat model, maybe it's time to switch to Linux.