I havent tried to alter the buffer size I dont even know how to do that..
But I have tried to update the graphics driver on the latest version but no luck..
And the HDD LED is not flashing when the pc is freezing...when working in windows is the same just the power light is on and thats all....when the hdd light is flashing the pc comes back again...
I have run Intel burn test yesterday on my pc on standard and maximum settings as well and the result was successful both time and the system is stable..
I have made a bootable usb to run memtest 86 again--no errors found