how to lock a folder?

[acercon]

i have tried going to my properties - advance - encrypt contents to secure data but that option is blurred and i cannot click it i think that means my computer doesnt support this feature, what other ways can i lock a folder?

Thanks

[Arty]

i have tried going to my properties - advance - encrypt contents to secure data but that option is blurred and i cannot click it i think that means my computer doesnt support this feature, what other ways can i lock a folder?

Thanks

3rd party software or

 

 

make a virtual hdd. and use bitlocker. 

[techguru]

i have tried going to my properties - advance - encrypt contents to secure data but that option is blurred and i cannot click it i think that means my computer doesnt support this feature, what other ways can i lock a folder?

Thanks

https://veracrypt.codeplex.com/