I've UPVC windows on the first floor of our house that were installed ten years ago. At the time, the installer told us that he'd forgotten to bring some keys and would post them to us. Unfortunately we didn't follow this up. Now I'm expecting a baby and anxious that I can't lock the windows of her bedroom as I've no keys. It's still a way yet before this becomes a real problem but can anyone advise me what to do? I can't afford to replace the window. The company was Forth Windows. I can't see them on the Internet so assume that the firm is no more. Thanks to anyone that reads this!