Ubuntu 17.04 and orca

Wed Apr 26 12:08:22 UTC 2017

Hello all!
I have a question.
I installed latest ubuntu 17.04 and runs orca screen reader.
When id press alt + f10 for access to menu(s) on the desktop, orca has been stopt.
If i press esc after this, orca work correctly.
What i can do to fix this situation?
And question 2.
I have a computer with intel core 2 duo @3.06 ggc processor + 8gb RAM, but orca is freeze.
What i can do?
Thanx in advanced.
Sorry for my English.