~ Vista Internet Sharing - WEIRD PROBLEM...

So, I have a big new Vista PC with an Asus motherboard (with 2 ethernet ports), and my two roomates have 2 laptops. One mac, one PC.
Up until a week ago, we would all share a connection through a linksys router that was connected to a cable modem.
The laptop wireless, and me physically.

That was all good and it worked without a problem. BUT, after I started playing online games again, I noticed that the fastest connections I was getting from servers were 40 - 50 (ping). That kinda pissed me off so I tried connecting my PC directly to the internet (without the router in the way), the lowest ones went down to 15 - 20.
Quite an improvement when it comes to Call of Duty 4

So I reconfigured the network. Disabled the DHCP on the router and hooked it up on my 2ND ethernet port,
Then I hooked up the cable modem directly to my PC. And enabled INTERNET SHARING on VISTA Ultimate.

Believe it or not, that ALSO worked, and Me, and my roomates all got fast internet access.

BUT - now, I have come to realize, that My computer's internet access is acting VERY strange. With the following symptoms:

A. I will go to a website, it will load nice and fast, and then I'll click on a link, firefox / ie will tell me that i'm offline. Immediately, without even trying to load the page. I'll hit REFRESH, and the page will load fine. (sometimes it will take 2 - 3 hits on the refresh button)

B. I will manually type in a website in the address field or push a link in another website, and instead of that website I'll get WWW.GOOGLE.COM. no matter how many times I try to refresh.

C. My internet connection will suddenly die out - but ONLY the browser part. Yesterday I was Video confrencing with a friend, and iE / Firefox / Safari all REFUSED to acknowledge there was an internet connection although I was actively talking and seeing my friend just fine on Messenger / Skype.

I'm a computer technician by trade but this boggles me.. I believe i'm experiencing dropped packets but I'm not sure what steps to take to solve this (and I don't want to reconnect my PC to the router the old way)

Any advice would be much appreciated.

Thank you.

not sure if you have solved your problem....
this is 2nd time i was having the same issue....
1st time i found out it causd by the ipv6, wat u need to do is go to the connection properties and disable those related to ipv6.....
on the 2nd time i had the same problem and to my surprise its due to my VPN client (checkpoint secure remote).... disable those as well and u will be good to go..... goodluck...

-fattsum-