Unable to connect to google

Unable to connect to any google gmail etc, all other sites open fine.

Tried suggestion from this link but i still have problem:

http://forums.techguy.org/web-email/...mail-page.html

i previously installed mcafee so I removed it and it got connected to google. Then I installed avast free.. Now the prob started again.

Tried all the possible solution. I use IE to connect to network.

Please help me.. Im now really mad at this laptop