We have all heard about window problems also keys unable to be copied , but listen to this ,,,steves story Replaced all running gear ,back and front ,mk1 skoda roomster 1,6 16v (power without turbo assist and chain ) Unfortunately i couldnt drive for a while, also i needed duplicate keys ,in the meantime fitted new drive shafts and repaired a leaking lower washer bottle pipe .also booked an auto electrician , Now car wouldnt start ! process of finding the problem ....still no luck,,,i then changed the starter motor ,(yes it just packs up ,) my instinct in the old days was to check the starter motor, but as the keys were about to be copied ,jumped that crucial stage , i kept my didnt work key (retrospectively best thing i did),auto electrician had another job with window malfunction and no communication with ecu /bcm unit , He checked drivers door switch ,! and linked/bypassed switch wires ,result communication with car problem solved ,IT WAS THE ELECTRIC WINDOW SWITCH phoned and offered me that advice ,and then i remember windows not operating till summer ,!!!!!! Finally i used my not working key ,BACK ON ROAD in conclusion .Wanted spare keys but starter motor had packed up at the same time , with a communication fault adding to the confusion ,a fine old mix ,ALL UP AND RUNNING NOW Steve