Please help my Fiesta ecoboost's electric windows both completely opened in the night. How could this happen the car was fully locked and both windows were fully closed.

If you hold down the unlock button all Windows will come down. Maybe this happened

Thanks Mitchell. I definitely didn't do that unless my keys are faulty. Can you disable this function? 

Did it happen again this morning?

If so you're going to have to disconnect the battery every night while you get it sorted. Has anything been taken?

Easiest thing is to keep your keys away from your car so you can't unlock it from where they are kept (meaning if they are faulty then it can't do anything to your car). It's extremely bad practice to keep them next to the front door, so most places after that should be out of reach anyway. Just try unlocking the car from wherever you decide to put them, if it unlocks put them someplace else.

I'd perhaps try that first before going stupid tearing the car apart fault finding

Hi Luke 

No it didn't happen again this morning. Nothing was taken from the car yesterday and I'm sure the global opening had been activated    Somehow. Thanks for the advice regarding the keys. I just hope there's no electrical fault within the car. 

It must have been the global opening. I've stopped carrying my car keys in my pocket around the house and it hasn't happened again.