Vawii, Welcome to the windows 7 forums.
FWIW: Before you encrypt any drive, PLEASE backup any critical data and you should create a system image of the drives that you are going to encrypt. store them someplace safe and then, when the crap hits the fan and you can't access your data anymore on your encrypted drives. You will have a warm fuzzy and will feel really good that you heeded the advice of others to make a good image before you bitlockered anything.
There are several free imaging programs available in order to sya.
Just my opinion.