I cant disable hardware acceleration as with right click the only choice i ve got is "About flash 11...." . I installed the latest drivers for Intel G33/31 VGA.

Yea i checked, actually the most strange is that Flash not working in all 3 browsers, Chrome, Mozilla and IE8. After installation, everything looks ok, i can go to Control Panel and see the Flash settings there (just some delete from storage etc options), and generally speaking the installation seems to finish with no problem. But when i go to Adobe check page, or in youtube, looks that is not working. One thing i dont know is if windows have a choise of what player to use forn flash content. (maybe something else its checked for play this content).

I reinstalled and install again flash through ALL the steps in Adobe page, including registry tip with a microsoft tool (last step) . Of course reformat is a solution, but i dont think is logical to need reformat just for a program.

I ll try it and send feedback. One thing that confuses me, is that in IE8 and Chrome, it doesnt say that Flash is not installed, its just saw a black screen (video didnt loaded). In the other hand, Mozilla plays youtube video (with html5 support) so its not problem with Youtube or something. Anyway, i ll try later Pat your suggestions and i ll post the results (hope to be good results).

Cleaned Flash, istalled the Beta 11.2, checked IE8 (all addons disabled , only Flash enabled) still movie not loaded and black screen

burnedtoast check your firewall, probably something blocks the adobe server. If you have other Adobe products installed, maybe you ve got "tweak" hosts file (windows/system32/drivers/etc ).

Of course you can download manually the Flash player and probably you ll not have problem. If the problem persists only in Mozilla, clean cache, history etc,  and in Tools- General -Manage addons, that Flash is there and enabled.