internet access problem

[Josh W]

my girlfriend has a cable modem, and just got a new computer. She has a wireless internet connection, and changed some settings on internet explorer.

I told her "get firefox". Well, now she keeps getting booted off very regularly after a very short period of time, and she doesn't think she can download anything because of it.

I've brought my laptop over to her place, and have no access problems, so it must be with her computer, not her cable modem. Any ideas what she can do to get things back to normal? I suggested just "reset internet settings" on IE, but she doesn't want to re-setup everything she set up. She's hoping its just one box she needs to check/uncheck.

Thanks in advance.

Josh