Blogged from Steve Lamb’s TEchnet space
Bitlocker is the feature of Windows Vista that I’m asked about more than any other. There follows a list of links to an excellent series of resources covering BitLocker in technical detail. Before I get to the guides I’d also like to refer you to the BitLocker Team blog which is a great source of information in itself including details of the recent cosmetic changes to the interface in the BitLocker Makeover.
By far the most popular guide is the Windows BitLocker Drive Encryption Step-by-Step Guide