No, I haven't called. We have Time Warner Cable and they're usually fairly decent with support; however, it's well past closing time.
I have a Macintosh laptop, two of my guys have laptops with Windows XP, and the new guy has Vista. Nobody else has problems; so, that led me to believe it is a Vista issue and not necessarily the ISP.
His computer connects to the router; but, the internet is "stalled". When this happens to me, I go to my Mac's network control panel and I renew the DHCP lease. Unfortunately, we can't work out where the "DHCP button" is in Vista.
ETA: I've just learned that he can go to his command line and put in ipconfig /renew but I don't know if he'll go for that solution. (He's gone to bed now, so I can't try). I'm going to keep googling for the actual Vista control panel way of doing it.
.....Kelly