In my PC I have recently installed Google chrome but not incidentally it has stppoed working also my PC says we have internet access ,and also internet explorer says computer is connected but chrome denies it what should I do

Check your firewall settings. It sounds like it is rejecting Chrome.

I take it you have uninstalled and installed Chrome again?

1 - Unistall Chrome and delete the user files (Chrome Folder) located here:
%LOCALAPPDATA%\Google (Open Windows Explorer and past this link in the bar right at the top.)
2 - Uninstall all toolbars found in your Programs List (Control Panel)
3 - Reistall Chrome.

Hope this helps
Grant