Hi all I recently made the switch from the dreadful windows to ubuntu and have to say i love the OS,that being said i am having an issue
when starting to run some programs the system stops responding
the mouse does move but i cant click on anything and keyboard does not respond doesn't even light up for caps lock

it first happened when running firefox with google search bar so i done so searching and found a post saying there where some issues with the google bar so i removed firefox completely lol and still didnt fix it but it hasn't frozen while on the web at least not yet,but the last couple of times it has done this was while trying to load certain programs like a firewall or certain games i was wondering if maybe i had tried to run a program that was to much for my system but my system falls in at least with the min requirements.

I was just wondering if this was a bug or if someone else has been having the same issue thank you in advance.