I'm looking for a product that can safely and reliably encrypt the hard drives on our laptops. I've read that Symantec's Disk Encryption is a good product but can be a bit pricey. Dows anyone have an opinion on Microsoft's Bit Locker? How soes this product compare to Symantec? What other encryption tools are worth looking into? Will Bit Locker encrypt the entire drive or does it do file encryption?