I'd pop some USB memory stick in there to get it working again.
There are far too many reasons for the internet to stop working. Remember you wrote it's XP and not XP with Norton security. As such I can't guess if it's that old reason or another.
Cheap fix. Use USB memory sticks to move stuff around.
I just goto my new iMac a week ago after more than 20 years on PC. It's a challenge, but I'm making some progress, I have TWC for internet access. It's working fine on TV, iMac, iPad and iPhone. But suddenly after a day of running them both, the internet stopped on my old Win XP. After about 2 hours on the phone wit TWC, she said there was nothing they could do that I would have to call Microsoft. Yeah, sure, with Win XP! Everything is wireless except this old computer and we tried changing the cable but that didnt work. I really need that internet connection to transfer stuff to the new computer. Any suggestions of what I might try? I'm kind of desperate. Many thanks, Peggy