Hi. let say I have 3d max inside a folder I want to lock that folder by password but I want to open that 3d max from desktop! So is that possible? Which software can do this? Also I need to send file inside that folder when it's locked by password.
If you "own" the computer (you're administrator), you can set the folder containing sensitive info to be accessible only to selected users. This won't prevent, however, someone with physical access to get access to the information.
The most secure way is to put that folder in some encrypted container (you can use BitLocker for that), and unlock it on demand.