The computer wouldn't freeze for 5-10 seconds and repeat a sound played at the same second
Sorry but not sure what you mean by the above, you have not mentioned this before, does this happen when you get the CPU spikes, if yes, the issue could be hardware related as in a power spike.
Download then run Speccy (free) and post the resultant url for us, details here, this will provide us with information about your computer hardware + any software that you have installed that may explain the present issue/s.