using MS encryption on a partition or folder works neat except ...
the encryption key is tied to the login password. Loose the password and
you NEVER get back your data. Google for MS encryption and see for yourself.
I have chosen to use a 3rd party PGP system for my laptop. This allows me
encryption on specific files and the ability to manage login vs encryption keys
independently.
fyi: the software is found at FileAssurity
and NO, I have no relationship with the company.