The upgrade reinstalled e-trust antivirus (which I had inadvertently removed previously) & also gave me Skype which wasn't previously included on my phone. Seeing E-trust again makes me realize just how much it slows down my k-jam. I removed it again! Thinking about it, Skype may be the cause of my re-boot problem. I'll try removing it & post back.
Has anyone else experiences this re-booting problem?