gramesh wrote:Thanks for your reply, yes I tried Bridged, the same error it is showing. Sorry I did not mention VB version earlier, it is "VirtualBox-4.1.12-77245-Win".
You mean to say I shall install VB again on top of the present installation and I should "install VBox Additions" this time?
No, installing it again was just an effort to get you to be able to try Bridged, since the problem that you mentioned when attempting to enable it sounded like Bridged wasn't installed.
Anyway, the additions are installed from within the VM (see the pull-down VB menu), but as you can see from this thread, you can encounter other problems getting those installed in W8. They aren't required for networking to work that I recall.