joecaff2

Time for a stupid question: Trying to upgrade to Android 2.1 from 1.6 on my 4 day old Xperia X10. I am following detailed instructions on Sony Insider I can see in my download history the following: Backup-and-restore-X10-2.apk (from m.sonyericsson.com) 2.3MB Download complete 12/20/10. Here's the issue when I tap it in get the following message> Install blocked for security, your phone is set to block installation of applications not sourced in Android Market. I know it must be something easy but I cannot resolve this problem. Any thoughts?