This is not enough information to get a specific answer. You haven't
told us things like:
1. How you connect to the Internet - method/ISP
2. Service Pack level
3. What antivirus you have installed - name, version, and if
subscription is active
4. What changed between the time things worked and the time they didn't
5. What you've already done to troubleshoot.
Here's a link to help you make a good newsgroup post:
http://www.dts-l.org/goodpost.htm
And here's a link to help you make sure your computer is
virus/malware-free (one of the first steps in t-shooting connection
problems):
http://www.elephantboycomputers.com/page2.html#Removing_Malware
Malke
--
MS-MVP Windows User/Shell
Elephant Boy Computers
www.elephantboycomputers.com
"Don't Panic"