As my laptop hard rive was knackered i was adivsed to use ubuntu, it set-up perfectly. but i tried downloading google chrome and flash player because i couldnt watch any videos and now FIREFOX has become unresponsive.

It says ' firefox is already running but it is not responding. To open a new window, you must firstr close the exisitng firefox process or restart your system

I tried restarting but hasn't worked.

Ubuntu also asked me if i wanted to do a update which i did, could this be a problem also.

Need help desperately going insane

James