That is not a dumb question at all!
You will download logmein utility on the main computer. Then the first time you are going to use the 2nd computer to access the main by logging into your logmein account, they will download a small file to the 2nd computer. Only takes a minute to do that.
If you have any trouble, just give me a shout. I'll be happy to try and help you. I'm home from vacation.
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