AIS 9.0.2011.263 works too unstable.

I was led on advertising in the first theme , downloaded AIS 9.0.2011.263 and installed it after in safe mode deleted AIS 8.0.1497.
Works a little better than AIS 9.0.2008, but still unstable. After a while booting three different browser, the problem starts with simultaneous operation of the browser and music playback . Disabling the firewall that helps, no. And in the end, when all browsers loaded stopped, tried to turn off all antivirus screens, and then could not turn them back. All this set me off balance and I went back to 8.0.1497. And again earned perfect. This story is from 9.0. starts to remind me of Win Vista (also a bunch of defects ).
And anyway, tired of being a tester , I want to be a regular user :-\