Windows XP SP2
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One ISP account Two computers

Question 1
I have a desktop computer that is set up for the Internet and a mail account
(OE). I have a new laptop for which I have to do the same thing.

I think I first have to set up the laptop with the same master account
information from the Desktop's ISP. Then the next thing would be to set up a
mail sub account for the Laptop.

If that's correct, do I set up this sub account on the Desktop, or directly
on the Laptop? (account: different user name, different password).

Question: 2
When both computers used the same master account information during this
setup, does that mean each machine can go to directly to the internet or to
get mail, or do we need identity switching between accounts?

Question 3:
If I were using the internet to make comparisons on some information, could
I have both the laptop and the desktop connecting at the same time?