Basically every password, form, data, etc. ever entered on your computer through the standard unencrypted process is accessible even without having to know the admin password if the person knows how. Yes - it is a scary reality, although you are better safe than sorry if you at least try and take the right precautions before something could happen. Most people really have no idea how unsecure their data is, and unfortunately that is how people get royally screwed too. Let me put it this way ... no matter what measures you take to protect yourself keep in mind that nothing is foolproof and can be broken. Even when you use Roboform and have your passwords encrypted you still have to use common sense - changing pw's every so often, and not using the same one on every website you goto ... lol.
Here's a bit more about Roboform to answer your question on what the difference is.
If somebody steals your RoboForm Passcard files, can they get into your accounts?
If you password-protect all sensitive Passcards and Identities and then it will be very difficult. Specifically, all password-protected Passcards and Identities are stored in files that are encrypted by your Master Password using AES, BlowFish or 3DES. So a person who stole your computer or password files, will have to break these encryption algorithms in order to get your passwords from Passcards.
As long as you observe these rules, it should be very hard to use the stolen info:
* Password-protect all sensitive Passcards and Identities. Anyone can see and use Passcard or Identity that is not password-protected.
* Make your Master Password long enough and un-obvious enough, so that it cannot be defeated by a simple dictionary attack. Do not use any words or names from any widely used languages, make your Master Password at least 10 characters long.
* Use AES, BlowFish, or RC6 for encryption, they are harder to break than other algorithms.
~ Regards