almost same here, microsoft sites dont work but test update worked

ive googled a lot today and ive read something about setting the MTU.. Im no networking pro

but at 1 point i think i did something to my modem/router putting in 1500 to MTU and it worked for a while.. Too bad I think i did something else more terrible to it that today it wouldnt do it again.. Some networking pros can help here would be appreciated, i really loved how my friends envy my Windows7 RC lolz