Is there any way of removing the secuirty loack from my 7230? I have it set to lock after an hour, as this is the longest it will let me, however I don't want it to auto lock at all, it's so irritating!

Does anyone know how to remove it?

If it was pushed down by your company as an IT Policy, you have no options.

My colleague has a 7290 which does not have the security loack, but he doesn't know how to get rid of it.

Go into Options, scroll down to Security and the first thing says 'Password:', disable it.

cd.