12-04-2012 12:51 AM
12-04-2012 11:16 AM
Actually, this KB has been provided many times in relation to the AW portion of your issue:
As for the twitter icon, please be sure that you look everywhere for it (homescreen, downloads, applications, etc.) as well as ensure that "Show All" is active, in case the icon is hidden. Also be certain that the app is actually installed:
If it is not installed, then there would be no icon...
Good luck and let us know!