web broswers cutting down requiring a system reboot.

Hey Now everyone.

Recently I have been surfing the web on the dell inspriron 1501 when the web browser just stops loading pages. the internet still works since I can surf the net fine with the ipad. but none of my web browsers will continue to load pages until reboot my computer. sometimes it happens in 15 mins, sometimes 30, an hour, but once it stops loading, nothing I do seems to be able to revive it aside from a whole restart.

any ideas?

can you you still ping out in the command prompt?