whats wrong with my computer/internet? :(?

[hmmmm.............????]

ok, so basically theres something wrong with eithor my computer or my browser. there are 2 laptops hooked up to my wireless network [mine and my moms, both running vista] and i know this morning hers was having issues, and now mine is. i cant get my msn home page to load, or facebook, or myspace, or twitter on both internet explorer and firefox. my trend micro antivirus keeps telling me that it cant connect to the server to check for and download any new updates. my aim works though. for some odd reason i can access yahoo answers though, and google works too. i tried downloading the free norton scan from google pack and it wouldnt start downloading. if it matters, i have verizon dsl [which i hate] with a verizon router. ive had problems in the past with verizon, but i dont know if its them, or its my computer [which says its connected to my wifi] can someone please help me out and try to tell me whats wrong?! thanks!
*and ive reset my router. and my antivirus has never done this before... it usually always updates, atleast once a day
ive restarted several times, ive done windows security updates, ive done full system scan, and my moms laptop is literally like less than 2 feet away from the router, and my signal stregnth is 5 out of 5 bars. im like 12 feet away from it.
*and ive reset my router. and my antivirus has never done this before... it usually always updates, atleast once a day