you can encrypt the folder if the folder is in a NTFS
partition
right click the folder> property>general tag> advance>
select encrypt
make sure you have recovery agent enable, and backup
private key
encrpted file cant be de crypt if you lost private key and
also the private key of recovery agent
private key will be lost thru re installing windows.
make sure you know how to handle before encrypting any
file and folder...
Richard