[ITSv40]

I think the most likely culprit will be the drivers door switch pack. These are notorious for corrosion so would replace that first.

Thinking of it logically when the ignition is switched to position1 the accessories are live, radio, windows etc. The only thing stopping the windows from working is the switch breaking the circuit. If there is corrosion or a fault within the all four window switch it could be permanently live, thus operating the windows when the ignition is switched on. Then operating the switch to raise the windows breaks the circuit and makes the 'up' circuit live and the windows close.

It would be worth replacing the switch pack if only to discount that as the cause. Always handy to have a spare switch pack on the shelf, therefore not wasted if that is not the cause.