Car keep cutting off specially on after crossing the speed braker normally in second gear

What is "speed braker " ? never heard off it .

Sorry if you dont understand the speed braker i mean little road bumps which slow the speed down and my car window near passenger side is opening and closing but if i try to open it from driving side it opens but not closed it plz reply thx

You don't say what size engine , petrol or diesel .Window problem could be faulty switch or possibly broken wiring , especially where it passes through into door at front A pillar .

Sorry mate thx for window solution,i got zafira 1.7 disel design model 2013 hope thats help and find the problem.
Thx for your reply guys

No problem , I know them better as speed bumps .Cant think why they would cause this fault other than fuel splashing in tank dislodging any s**t or causing fuel restriction . Could try changing fuel filter if not been done recently .

Thanks guys for your opinions ,i will discuss with my mechanic