SP2 1213 and Mcafee Internet security

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Hi,

I have installed the SP2 1213 yesterday

After the installation, my connection to internet was gone..............I'm on cable modem...

I try several ways to find what was the problem and finally after long hours........I suspect the Mcafee firewall.
I choose to repair it and after a reboot, I have access to the internet again.

I load Mcafee again and I can check my mails with Outlook but I can't surf the web Repair again and I don't have load mcafee for the moment and my internet connection is OK

What's wrong with Mcafee and the SP2 1213 ??????????????? Now I run only NIS but I want to enable Mcafee too.

Need help please

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Nobody with this problem ??????? Or a solution ?