Browser crashes are unrelated to your choice of ISP.
If you're using Internet Explorer (mad, mad, mad!), go to the Microsoft website and check that you've got all of the latest updates. If that doesn't work, try using System Restore, to take your PC back to a date when your browser didn't crash.
Far better, use Firefox instead of IE:
http://www.mozilla.com/firefox/
(If you're already using Firefox, just reinstall it. You won't lose any settings or favourites. You don't even need to uninstall it first)
The vast majority of the 'regulars', here in AB's Technology section, use either Firefox or Chrome. Internet Explorer is, like nearly all Microsoft programs, widely regarded as 'a bit of a joke'.
Chris