PC Freeze/Crash when using Intel GPU (4400)

You are letting Boinc use your cpu for crunching, the Intel GPU is inside the cpu, while it is crunching it will use all or almost all of your cpu to do that, when you want to do something else it has to stop crunching and respond to your request, it can't do that INSTANTLY, it must do it in an orderly fashion, it IS a computer remember. All of this takes time and after it does what you wanted it to do it goes back to crunching, not having a clue that you may want to do something else. So when you then click to do something else, 'you mean you DIDN'T just want to open your browser and look at the home page?' Boinc must again stop crunching and do what you ask, and then take control right back again.

There ARE some settings you can adjust to make this less intrusive, but they will also slow down your crunching times and the number of workunits you can crunch, as you would then have more control of the cpu, and not Boinc.