ive had random times in the past few months where my laptop running 8.04 loses connection with the wired router, i have to disable and reenable networking in the toolbar for it to gain connection again.

i have all the latest updates, what could be causing this?

its annoying cause i use this laptop as my media server to stream movies an stuff thru my 2 WD Live media players and im always having to reboot in the middle of movies.