Unidentified Public Network on Windows 7

Hi mates,
I have installed Windows 7 on my computer. It picked up my wired and wireless router, printer and other devices. The cable connection to the internet worked. Everything was working correctly. I removed the wireless router.
But now Windows 7 is not getting connected to any devices. It is giving an error message, “unidentified public network”.
I have tried everything to fix the problem. Broadband cable connection is not available. Please Help.
Thank you.
