seeking information and specs on black window/door manufacturers that would work in multi-seasonal house

It's the window leaf itself that has bowed. Have attached couple of images that hopefully explain it better. It varies with each window but a lot of them have just warped all kinds of ways. The one below is probably a bit hard to see but has bowed in the middle.

Hi there, We recently renovated our house earlier this year by removing all the exisiting wallpaper and painted the walls over tge exisiting plasterboard. However, I've noticed straight line cracks appearing around our window edges. It's only cracking around windows and not doors. Anyone know why these are happening and should i be worried??Please note our house was built in 1970s and walls are not insulated so maybe its because of the recent cold weather but pretty annoyed with this. Any assistance would be great! Cheers

Hey all, we have a mid 90's house with a couple of glass brick windows, one of which has started to seep with heavy rain causing the interior sill Gib to crumble. How should I tackle this as I can't see any obvious area where water may be getting in. Cheers