This is assuming you use IE as your browser & OE as your email client (if you use others do the same for them as well):
1. Open NPF. 2. Click on Personal Firewall -> Configure -> Program Control. 3. Click on all the 'Iexplore' entires & click on Modify. 4. In the dialogue box, select Permit & click on OK. 5. Do the same for the Microsoft Outlook Express entry & select 'Automatically configure...' & click on OK. 6. Close NPF & check to see if the problem recurs.
Try this (if the above doesn't work) click here. It's to restore your Internet access. If your email access is still affected post back.
BTW, which OS are you using? If you have System Restore to could try going back to a time before the updates. I'm NOT sure if this is recommended in such a situation so it will be best for someone else to confirm this before you attemp it. But good luck with the rest! G