Easiest way to secure files?

[OzZie]

I have a few personal files that i don't want anyone having access to such as login details and serial keys etc. At the moment i'm simply creating a zipped folder in windows and adding a password, but this doesnt stop the chance for people to simply delete the whole folder.

I have winrar (free) but i can't seem to add any security to my files. Is there another application that can do what i am after?

Thanks.