Thanks for the info guys. I reckon the CruzerLock 2 memory stick looks like a good route to take. So because they have a partition with autorun does that mean they will work on a machine with limited access, as opposed to apps like truecrypt which you have to load up manually and have admin privileges to get the drivers that deal with the decryption running? Funnily enough, i have a SanDisk USB drive at the minute, but it does not have the encryption software installed. Maybe it is possible to download it from their website.