cannot connect to the sql server and remote computer

i was able to connect to the sql server and to the remote computer from my laptop at home.Yesterday i uninstalled my anitivirus software and after that i am not able to connect to the sql server as well as to the remote computer.
whenever i try to connect to the sql server i get the error message of sql server

( provider: Named Pipes Provider, error: 40 – could not open a connection to SQL server.
 In the same way i cannot connect to my remote machine.My VPN is working properly
sqlcuriousAsked:
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jmnfCommented:
Maybe your antivirus had a firewall with sql program/port exception, you may have to create a new program/port exception on your new firewall.
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sqlcuriousAuthor Commented:
hi jmnf:

how to create program/port exception on your new firewall.
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sqlcuriousAuthor Commented:
And what could be the problem of not connecting to the remote computer from my laptop.It was working fine other day
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jmnfCommented:
To add firewall exception:
For windows Vista/7 you can follow this page instructions:

http://www.worldstart.com/how-to-set-up-windows-firewall-exceptions/

Windows XP is almost exactly, justo go to Control Panel, open Firewall, and follow from step 6 from previous article.

For proxy settings:
Chech the following page:
http://www.freeproxy.ru/en/free_proxy/howuse.htm

You should also check for your network settings.
In Control Panel, open Network Connections, right click on your network connection and click on properties, select TCP/IP 4, click on properties, and make sure the settings are the ones you need... usually automatic... but make sure to write down (or alt+print screen to save ascreenshot of window) before making changes.

And finally check your Internet Connection settings:
Control Panel, Internet Options, Connection, LAN Settings... check Automatically Detect Settigns.
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