The title says everything
I used to have a an area in the advanced tab of my local area connection properties to allow other users to connect through this computer's internet connection.
Same as this: http://www.microsoft.com/library/media/1033/windowsxp/images/using/networking/expert/ICS_02.jpg
The connection was remaining shared (the icon was shown with a HAND symbol) and I couldn't disable the sharing so I uninstalled the NIC adapter and after reinstalling it, the HAND icon was gone but I could not re-enable the sharing again, as I described above, the sharing area is not there and I'm totally F... up finding a solution
PLEASE HELP ME