One thing I found was I do not have Administrative access on the computer I use at work and I cannot install a program. I can access my USB drive but not the security software on it. I have since found that most "public" access computers are set up the same. I have gone to password protecting the files rather than taking the chance of not being able to decrypt. Not as secure but if I can't get the data when I need it there is not much use carrying it.